1
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Tanaka S, Fujioka S, Ikeda T, Suga T, Nakajima D, Ohsumi A, Uemura S, Date H. A case of living-donor segmental lung transplantation and concomitant Nuss procedure in a pediatric patient with pectus excavatum. JTCVS Tech 2023; 21:199-202. [PMID: 37854817 PMCID: PMC10580102 DOI: 10.1016/j.xjtc.2023.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 06/28/2023] [Accepted: 06/30/2023] [Indexed: 10/20/2023] Open
Affiliation(s)
- Satona Tanaka
- Department of Thoracic Surgery, Kyoto University Hospital, Kyoto, Japan
| | - Sachie Fujioka
- Department of Thoracic Surgery, Kyoto University Hospital, Kyoto, Japan
| | - Tadashi Ikeda
- Department of Cardiovascular Surgery, Kyoto University Hospital, Kyoto, Japan
| | - Takenori Suga
- Department of Pediatrics, Kyoto University Hospital, Kyoto, Japan
| | - Daisuke Nakajima
- Department of Thoracic Surgery, Kyoto University Hospital, Kyoto, Japan
| | - Akihiro Ohsumi
- Department of Thoracic Surgery, Kyoto University Hospital, Kyoto, Japan
| | - Sadashige Uemura
- Division of Chest Wall Surgery, Nishinomiya Watanabe Cardiovascular Center, Nishinomiya, Hyogo, Japan
| | - Hiroshi Date
- Department of Thoracic Surgery, Kyoto University Hospital, Kyoto, Japan
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2
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Moody JD, Pollock BB, Sio H, Strozzi DJ, Ho DDM, Walsh CA, Kemp GE, Lahmann B, Kucheyev SO, Kozioziemski B, Carroll EG, Kroll J, Yanagisawa DK, Angus J, Bachmann B, Bhandarkar SD, Bude JD, Divol L, Ferguson B, Fry J, Hagler L, Hartouni E, Herrmann MC, Hsing W, Holunga DM, Izumi N, Javedani J, Johnson A, Khan S, Kalantar D, Kohut T, Logan BG, Masters N, Nikroo A, Orsi N, Piston K, Provencher C, Rowe A, Sater J, Skulina K, Stygar WA, Tang V, Winters SE, Zimmerman G, Adrian P, Chittenden JP, Appelbe B, Boxall A, Crilly A, O'Neill S, Davies J, Peebles J, Fujioka S. Increased Ion Temperature and Neutron Yield Observed in Magnetized Indirectly Driven D_{2}-Filled Capsule Implosions on the National Ignition Facility. Phys Rev Lett 2022; 129:195002. [PMID: 36399755 DOI: 10.1103/physrevlett.129.195002] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 09/26/2022] [Indexed: 06/16/2023]
Abstract
The application of an external 26 Tesla axial magnetic field to a D_{2} gas-filled capsule indirectly driven on the National Ignition Facility is observed to increase the ion temperature by 40% and the neutron yield by a factor of 3.2 in a hot spot with areal density and temperature approaching what is required for fusion ignition [1]. The improvements are determined from energy spectral measurements of the 2.45 MeV neutrons from the D(d,n)^{3}He reaction, and the compressed central core B field is estimated to be ∼4.9 kT using the 14.1 MeV secondary neutrons from the D(T,n)^{4}He reactions. The experiments use a 30 kV pulsed-power system to deliver a ∼3 μs current pulse to a solenoidal coil wrapped around a novel high-electrical-resistivity AuTa_{4} hohlraum. Radiation magnetohydrodynamic simulations are consistent with the experiment.
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Affiliation(s)
- J D Moody
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - B B Pollock
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - H Sio
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D J Strozzi
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D D-M Ho
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - C A Walsh
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - G E Kemp
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - B Lahmann
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S O Kucheyev
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - B Kozioziemski
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - E G Carroll
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J Kroll
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D K Yanagisawa
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J Angus
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - B Bachmann
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S D Bhandarkar
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J D Bude
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - L Divol
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - B Ferguson
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J Fry
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - L Hagler
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - E Hartouni
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M C Herrmann
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - W Hsing
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D M Holunga
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - N Izumi
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J Javedani
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Johnson
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S Khan
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D Kalantar
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - T Kohut
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - B G Logan
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - N Masters
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Nikroo
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - N Orsi
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - K Piston
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - C Provencher
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Rowe
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J Sater
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - K Skulina
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - W A Stygar
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - V Tang
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S E Winters
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - G Zimmerman
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - P Adrian
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - J P Chittenden
- Centre for Inertial Fusion Studies, The Blackett Laboratory, Imperial College, London SW7 2AZ, United Kingdom
| | - B Appelbe
- Centre for Inertial Fusion Studies, The Blackett Laboratory, Imperial College, London SW7 2AZ, United Kingdom
| | - A Boxall
- Centre for Inertial Fusion Studies, The Blackett Laboratory, Imperial College, London SW7 2AZ, United Kingdom
| | - A Crilly
- Centre for Inertial Fusion Studies, The Blackett Laboratory, Imperial College, London SW7 2AZ, United Kingdom
| | - S O'Neill
- Centre for Inertial Fusion Studies, The Blackett Laboratory, Imperial College, London SW7 2AZ, United Kingdom
| | - J Davies
- University of Rochester, New York 14623, USA
| | - J Peebles
- Laboratory for Laser Energetics, New York 14623, USA
| | - S Fujioka
- Institute for Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan
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3
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Ehret M, Kochetkov Y, Abe Y, Law KFF, Bukharskii N, Stepanischev V, Fujioka S, d'Humières E, Zielbauer B, Bagnoud V, Schaumann G, Somekawa T, Roth M, Tikhonchuk V, Santos JJ, Korneev P. Kilotesla plasmoid formation by a trapped relativistic laser beam. Phys Rev E 2022; 106:045211. [PMID: 36397600 DOI: 10.1103/physreve.106.045211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
A strong quasistationary magnetic field is generated in hollow targets with curved internal surface under the action of a relativistically intense picosecond laser pulse. Experimental data evidence the formation of quasistationary strongly magnetized plasma structures decaying on a hundred picoseconds timescale, with the magnetic field strength of the kilotesla scale. Numerical simulations unravel the importance of transient processes during the magnetic field generation and suggest the existence of fast and slow regimes of plasmoid evolution depending on the interaction parameters. The proposed setup is suited for perspective highly magnetized plasma application and fundamental studies.
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Affiliation(s)
- M Ehret
- Université de Bordeaux, CNRS, CEA, Centre Lasers Intenses et Applications (CELIA), UMR 5107, Talence, France
- Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany
| | - Yu Kochetkov
- National Research Nuclear University MEPhI, Moscow, Russian Federation
| | - Y Abe
- Graduate School of Engineering, Osaka University, Japan
- Institute of Laser Engineering, Osaka University, Japan
| | - K F F Law
- Institute of Laser Engineering, Osaka University, Japan
| | - N Bukharskii
- National Research Nuclear University MEPhI, Moscow, Russian Federation
| | - V Stepanischev
- National Research Nuclear University MEPhI, Moscow, Russian Federation
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, Japan
| | - E d'Humières
- Université de Bordeaux, CNRS, CEA, Centre Lasers Intenses et Applications (CELIA), UMR 5107, Talence, France
| | - B Zielbauer
- Plasma Physik/PHELIX, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - V Bagnoud
- Plasma Physik/PHELIX, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - G Schaumann
- Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany
| | - T Somekawa
- Institute of Laser Engineering, Osaka University, Japan
- Institute for Laser Technology, 1-8-4 Utsubohonmachi, Osaka 550-0004, Japan
| | - M Roth
- Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany
| | - V Tikhonchuk
- Université de Bordeaux, CNRS, CEA, Centre Lasers Intenses et Applications (CELIA), UMR 5107, Talence, France
- ELI-Beamlines, Institute of Physics Academy of Sciences of the Czech Republic, Dolní Břežany, Czech Republic
| | - J J Santos
- Université de Bordeaux, CNRS, CEA, Centre Lasers Intenses et Applications (CELIA), UMR 5107, Talence, France
| | - Ph Korneev
- National Research Nuclear University MEPhI, Moscow, Russian Federation
- P. N. Lebedev Physical Institute of RAS, Moscow, Russian Federation
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4
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Abe Y, Nakao A, Arikawa Y, Morace A, Mori T, Lan Z, Wei T, Asano S, Minami T, Kuramitsu Y, Habara H, Shiraga H, Fujioka S, Nakai M, Yogo A. Predictive capability of material screening by fast neutron activation analysis using laser-driven neutron sources. Rev Sci Instrum 2022; 93:093523. [PMID: 36182514 DOI: 10.1063/5.0099217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 08/22/2022] [Indexed: 06/16/2023]
Abstract
Bright, short-pulsed neutron beams from laser-driven neutron sources (LANSs) provide a new perspective on material screening via fast neutron activation analysis (FNAA). FNAA is a nondestructive technique for determining material elemental composition based on nuclear excitation by fast neutron bombardment and subsequent spectral analysis of prompt γ-rays emitted by the active nuclei. Our recent experiments and simulations have shown that activation analysis can be used in practice with modest neutron fluences on the order of 105 n/cm2, which is available with current laser technology. In addition, time-resolved γ-ray measurements combined with picosecond neutron probes from LANSs are effective in mitigating the issue of spectral interference between elements, enabling highly accurate screening of complex samples containing many elements. This paper describes the predictive capability of LANS-based activation analysis based on experimental demonstrations and spectral calculations with Monte Carlo simulations.
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Affiliation(s)
- Y Abe
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - A Nakao
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - Y Arikawa
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - A Morace
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - T Mori
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - Z Lan
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - T Wei
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - S Asano
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - T Minami
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - Y Kuramitsu
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - H Habara
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - H Shiraga
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - M Nakai
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - A Yogo
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
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5
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Kochetkov IV, Bukharskii ND, Ehret M, Abe Y, Law KFF, Ospina-Bohorquez V, Santos JJ, Fujioka S, Schaumann G, Zielbauer B, Kuznetsov A, Korneev P. Neural network analysis of quasistationary magnetic fields in microcoils driven by short laser pulses. Sci Rep 2022; 12:13734. [PMID: 35962017 PMCID: PMC9374746 DOI: 10.1038/s41598-022-17202-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 07/21/2022] [Indexed: 11/09/2022] Open
Abstract
Optical generation of kilo-tesla scale magnetic fields enables prospective technologies and fundamental studies with unprecedentedly high magnetic field energy density. A question is the optimal configuration of proposed setups, where plenty of physical phenomena accompany the generation and complicate both theoretical studies and experimental realizations. Short laser drivers seem more suitable in many applications, though the process is tangled by an intrinsic transient nature. In this work, an artificial neural network is engaged for unravelling main features of the magnetic field excited with a picosecond laser pulse. The trained neural network acquires an ability to read the magnetic field values from experimental data, extremely facilitating interpretation of the experimental results. The conclusion is that the short sub-picosecond laser pulse may generate a quasi-stationary magnetic field structure living on a hundred picosecond time scale, when the induced current forms a closed circuit.
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Affiliation(s)
- Iu V Kochetkov
- National Research Nuclear University MEPhI, Moscow, Russian Federation
| | - N D Bukharskii
- National Research Nuclear University MEPhI, Moscow, Russian Federation
| | - M Ehret
- Centre Lasers Intenses et Applications (CELIA), UMR 5107, Université de Bordeaux - CNRS - CEA, Talence, France.,Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany
| | - Y Abe
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, 565-0871, Japan.,Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - K F F Law
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | | | - J J Santos
- Centre Lasers Intenses et Applications (CELIA), UMR 5107, Université de Bordeaux - CNRS - CEA, Talence, France
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - G Schaumann
- Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany
| | | | - A Kuznetsov
- National Research Nuclear University MEPhI, Moscow, Russian Federation
| | - Ph Korneev
- National Research Nuclear University MEPhI, Moscow, Russian Federation. .,Lebedev Physical Institute, Moscow, Russian Federation.
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6
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Tamagawa T, Hironaka Y, Kawasaki K, Tanaka D, Idesaka T, Ozaki N, Kodama R, Takizawa R, Fujioka S, Yogo A, Batani D, Nicolai P, Cristoforetti G, Koester P, Gizzi LA, Shigemori K. Development of an experimental platform for the investigation of laser-plasma interaction in conditions relevant to shock ignition regime. Rev Sci Instrum 2022; 93:063505. [PMID: 35778032 DOI: 10.1063/5.0089969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 05/25/2022] [Indexed: 06/15/2023]
Abstract
The shock ignition (SI) approach to inertial confinement fusion is a promising scheme for achieving energy production by nuclear fusion. SI relies on using a high intensity laser pulse (≈1016 W/cm2, with a duration of several hundred ps) at the end of the fuel compression stage. However, during laser-plasma interaction (LPI), several parametric instabilities, such as stimulated Raman scattering and two plasmon decay, nonlinearly generate hot electrons (HEs). The whole behavior of HE under SI conditions, including their generation, transport, and final absorption, is still unclear and needs further experimental investigation. This paper focuses on the development of an experimental platform for SI-related experiments, which simultaneously makes use of multiple diagnostics to characterize LPI and HE generation, transport, and energy deposition. Such diagnostics include optical spectrometers, streaked optical shadowgraph, an x-ray pinhole camera, a two-dimensional x-ray imager, a Cu Kα line spectrometer, two hot-electron spectrometers, a hard x-ray (bremsstrahlung) detector, and a streaked optical pyrometer. Diagnostics successfully operated simultaneously in single-shot mode, revealing the features of HEs under SI-relevant conditions.
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Affiliation(s)
- T Tamagawa
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Y Hironaka
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - K Kawasaki
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - D Tanaka
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - T Idesaka
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - N Ozaki
- Graduate School of Engineering and Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - R Kodama
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - R Takizawa
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - A Yogo
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - D Batani
- Centre Lasers Intenses et Applications, CELIA, University Bordeaux CEA-CNRS, UMR 5107, F-33405 Talence, France
| | - Ph Nicolai
- Centre Lasers Intenses et Applications, CELIA, University Bordeaux CEA-CNRS, UMR 5107, F-33405 Talence, France
| | - G Cristoforetti
- Intense Laser Irradiation Laboratory, INO-CNR, 56124 Pisa, Italy
| | - P Koester
- Intense Laser Irradiation Laboratory, INO-CNR, 56124 Pisa, Italy
| | - L A Gizzi
- Intense Laser Irradiation Laboratory, INO-CNR, 56124 Pisa, Italy
| | - K Shigemori
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
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7
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Abe Y, Kohri H, Tokiyasu A, Minami T, Iwasaki K, Taguchi T, Asai T, Kanasaki M, Kodaira S, Fujioka S, Kuramitsu Y, Fukuda Y. A multi-stage scintillation counter for GeV-scale multi-species ion spectroscopy in laser-driven particle acceleration experiments. Rev Sci Instrum 2022; 93:063502. [PMID: 35778001 DOI: 10.1063/5.0078817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 05/13/2022] [Indexed: 06/15/2023]
Abstract
Particle counting analysis (PCA) with a multi-stage scintillation detector shows a new perspective on angularly resolved spectral characterization of GeV-scale, multi-species ion beams produced by high-power lasers. The diagnosis provides a mass-dependent ion energy spectrum based on time-of-flight and pulse-height analysis of single particle events detected through repetitive experiments. With a novel arrangement of multiple scintillators with different ions stopping powers, PCA offers potential advantages over commonly used diagnostic instruments (CR-39, radiochromic films, Thomson parabola, etc.) in terms of coverage solid angle, detection efficiency for GeV-ions, and real-time analysis during the experiment. The basic detector unit was tested using 230-MeV proton beam from a synchrotron facility, where we demonstrated its potential ability to discriminate major ion species accelerated in laser-plasma experiments (i.e., protons, deuterons, carbon, and oxygen ions) with excellent energy and mass resolution. The proposed diagnostic concept would be essential for a better understanding of laser-driven particle acceleration, which paves the way toward all-optical compact accelerators for a range of applications.
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Affiliation(s)
- Y Abe
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - H Kohri
- Research Center for Nuclear Physics, Osaka University, Osaka 567-0047, Japan
| | - A Tokiyasu
- Research Center for Electron Photon Science, Tohoku University, Miyagi 982-0826, Japan
| | - T Minami
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - K Iwasaki
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - T Taguchi
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - T Asai
- Graduate School of Maritime Sciences, Kobe University, Kobe 658-0022, Japan
| | - M Kanasaki
- Graduate School of Maritime Sciences, Kobe University, Kobe 658-0022, Japan
| | - S Kodaira
- National Institute of Radiological Sciences (NIRS), National Institutes for Quantum and Radiological Science and Technology (QST), Chiba 263-8555, Japan
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - Y Kuramitsu
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - Y Fukuda
- Kansai Photon Science Institute (KPSI), National Institutes for Quantum and Radiological Science and Technology (QST), Kyoto 619-0215, Japan
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8
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Moody JD, Pollock BB, Sio H, Strozzi DJ, Ho DDM, Walsh C, Kemp GE, Kucheyev SO, Kozioziemski B, Carroll EG, Kroll J, Yanagisawa DK, Angus J, Bhandarkar SD, Bude JD, Divol L, Ferguson B, Fry J, Hagler L, Hartouni E, Herrmann MC, Hsing W, Holunga DM, Javedani J, Johnson A, Kalantar D, Kohut T, Logan BG, Masters N, Nikroo A, Orsi N, Piston K, Provencher C, Rowe A, Sater J, Skulina K, Stygar WA, Tang V, Winters SE, Chittenden JP, Appelbe B, Boxall A, Crilly A, O’Neill S, Davies J, Peebles J, Fujioka S. The Magnetized Indirect Drive Project on the National Ignition Facility. J Fusion Energ 2022. [DOI: 10.1007/s10894-022-00319-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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9
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Morace A, Abe Y, Honrubia JJ, Iwata N, Arikawa Y, Nakata Y, Johzaki T, Yogo A, Sentoku Y, Mima K, Ma T, Mariscal D, Sakagami H, Norimatsu T, Tsubakimoto K, Kawanaka J, Tokita S, Miyanaga N, Shiraga H, Sakawa Y, Nakai M, Azechi H, Fujioka S, Kodama R. Super-strong magnetic field-dominated ion beam dynamics in focusing plasma devices. Sci Rep 2022; 12:6876. [PMID: 35477961 PMCID: PMC9046386 DOI: 10.1038/s41598-022-10829-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Accepted: 03/22/2022] [Indexed: 11/21/2022] Open
Abstract
High energy density physics is the field of physics dedicated to the study of matter and plasmas in extreme conditions of temperature, densities and pressures. It encompasses multiple disciplines such as material science, planetary science, laboratory and astrophysical plasma science. For the latter, high energy density states can be accompanied by extreme radiation environments and super-strong magnetic fields. The creation of high energy density states in the laboratory consists in concentrating/depositing large amounts of energy in a reduced mass, typically solid material sample or dense plasma, over a time shorter than the typical timescales of heat conduction and hydrodynamic expansion. Laser-generated, high current–density ion beams constitute an important tool for the creation of high energy density states in the laboratory. Focusing plasma devices, such as cone-targets are necessary in order to focus and direct these intense beams towards the heating sample or dense plasma, while protecting the proton generation foil from the harsh environments typical of an integrated high-power laser experiment. A full understanding of the ion beam dynamics in focusing devices is therefore necessary in order to properly design and interpret the numerous experiments in the field. In this work, we report a detailed investigation of large-scale, kilojoule-class laser-generated ion beam dynamics in focusing devices and we demonstrate that high-brilliance ion beams compress magnetic fields to amplitudes exceeding tens of kilo-Tesla, which in turn play a dominant role in the focusing process, resulting either in a worsening or enhancement of focusing capabilities depending on the target geometry.
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Affiliation(s)
- A Morace
- Institute of Laser Engineering, Osaka University, Suita, Japan.
| | - Y Abe
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - J J Honrubia
- ETSI Aeronautica y del Espacio, Universidad Politecnica de Madrid, Madrid, Spain
| | - N Iwata
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - Y Arikawa
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - Y Nakata
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - T Johzaki
- Hiroshima University, Hiroshima, Japan
| | - A Yogo
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - Y Sentoku
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - K Mima
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - T Ma
- Lawrence Livermore National Laboratory, Livermore, USA
| | - D Mariscal
- Lawrence Livermore National Laboratory, Livermore, USA
| | - H Sakagami
- National Institute of Fusion Science, Toki, Japan
| | - T Norimatsu
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - K Tsubakimoto
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - J Kawanaka
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - S Tokita
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - N Miyanaga
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - H Shiraga
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - Y Sakawa
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - M Nakai
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - H Azechi
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - R Kodama
- Institute of Laser Engineering, Osaka University, Suita, Japan
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10
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Bonvalet J, Nicolaï P, Raffestin D, D'humieres E, Batani D, Tikhonchuk V, Kantarelou V, Giuffrida L, Tosca M, Korn G, Picciotto A, Morace A, Abe Y, Arikawa Y, Fujioka S, Fukuda Y, Kuramitsu Y, Habara H, Margarone D. Energetic α-particle sources produced through proton-boron reactions by high-energy high-intensity laser beams. Phys Rev E 2021; 103:053202. [PMID: 34134285 DOI: 10.1103/physreve.103.053202] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 04/08/2021] [Indexed: 11/07/2022]
Abstract
In an experiment performed with a high-intensity and high-energy laser system, α-particle production in proton-boron reaction by using a laser-driven proton beam was measured. α particles were observed from the front and also from the rear side, even after a 2-mm-thick boron target. The data obtained in this experiment have been analyzed using a sequence of numerical simulations. The simulations clarify the mechanisms of α-particle production and transport through the boron targets. α-particle energies observed in the experiment and in the simulation reach 10-20 MeV through energy transfer from 20-30 MeV energy incident protons. Despite the lower cross sections for protons with energy above the sub-MeV resonances in the proton-boron reactions, 10^{8}-10^{9}α particles per steradian have been detected.
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Affiliation(s)
- J Bonvalet
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France
| | - Ph Nicolaï
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France
| | - D Raffestin
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France
| | - E D'humieres
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France
| | - D Batani
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France
| | - V Tikhonchuk
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France.,ELI-Beamlines Center, Institute of Physics, Czech Academy of Sciences Za Radnici 835, 25241 Dolní Břežany, Czech Republic
| | - V Kantarelou
- ELI-Beamlines Center, Institute of Physics, Czech Academy of Sciences Za Radnici 835, 25241 Dolní Břežany, Czech Republic
| | - L Giuffrida
- ELI-Beamlines Center, Institute of Physics, Czech Academy of Sciences Za Radnici 835, 25241 Dolní Břežany, Czech Republic
| | - M Tosca
- ELI-Beamlines Center, Institute of Physics, Czech Academy of Sciences Za Radnici 835, 25241 Dolní Břežany, Czech Republic
| | - G Korn
- ELI-Beamlines Center, Institute of Physics, Czech Academy of Sciences Za Radnici 835, 25241 Dolní Břežany, Czech Republic
| | - A Picciotto
- Fondazione Bruno Kessler (FBK), Sensors and Devices - Micro Nano Facility, 38122 Trento, Italy
| | - A Morace
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Y Abe
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Y Arikawa
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Y Fukuda
- Kansai Photon Science Institute (KPSI), National Institutes for Quantum and Radiological Science and Technology (QST), 8-1-7 Umemidai, Kizugawa-shi, Kyoto 619- 0215, Japan
| | - Y Kuramitsu
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - H Habara
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - D Margarone
- ELI-Beamlines Center, Institute of Physics, Czech Academy of Sciences Za Radnici 835, 25241 Dolní Břežany, Czech Republic.,Centre for Plasma Physics, Queen's University Belfast, BT71NN Belfast, Northen Ireland, United Kingdom
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11
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Abe Y, Morace A, Arikawa Y, Mirfayzi SR, Golovin D, Law KFF, Fujioka S, Yogo A, Nakai M. Dosimetric calibration of GafChromic HD-V2, MD-V3, and EBT3 films for dose ranges up to 100 kGy. Rev Sci Instrum 2021; 92:063301. [PMID: 34243550 DOI: 10.1063/5.0043628] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 05/10/2021] [Indexed: 06/13/2023]
Abstract
A dosimetric calibration of three types of radiochromic films (GafChromicTM HD-V2, MD-V3, and EBT3) was carried out for absorbed doses (D) ranging up to 100 kGy using a 130 TBq Co60 γ-ray source. The optical densities (ODs) of the irradiated films were acquired with the transmission-mode flatbed film scanner EPSON GT-X980. The calibration data were cross-checked using the 20-MeV proton beam from the azimuthally varying field cyclotron at the Research Center for Nuclear Physics in Osaka University. These experimental results not only present the measurable dose ranges of the films depending on the readout wavelength, but also show consistency with our hypothesis that the OD response curve [log(OD)-log(D) curve] is determined by the volumetric average of the absorption dose and does not strongly depend on the type of radiation for the excitation.
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Affiliation(s)
- Y Abe
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - A Morace
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - Y Arikawa
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - S R Mirfayzi
- Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
| | - D Golovin
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - K F F Law
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - A Yogo
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - M Nakai
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
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12
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Kawahito D, Bailly-Grandvaux M, Dozières M, McGuffey C, Forestier-Colleoni P, Peebles J, Honrubia JJ, Khiar B, Hansen S, Tzeferacos P, Wei MS, Krauland CM, Gourdain P, Davies JR, Matsuo K, Fujioka S, Campbell EM, Santos JJ, Batani D, Bhutwala K, Zhang S, Beg FN. Fast electron transport dynamics and energy deposition in magnetized, imploded cylindrical plasma. Philos Trans A Math Phys Eng Sci 2021; 379:20200052. [PMID: 33280559 PMCID: PMC7741014 DOI: 10.1098/rsta.2020.0052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Accepted: 07/30/2020] [Indexed: 06/12/2023]
Abstract
Inertial confinement fusion approaches involve the creation of high-energy-density states through compression. High gain scenarios may be enabled by the beneficial heating from fast electrons produced with an intense laser and by energy containment with a high-strength magnetic field. Here, we report experimental measurements from a configuration integrating a magnetized, imploded cylindrical plasma and intense laser-driven electrons as well as multi-stage simulations that show fast electrons transport pathways at different times during the implosion and quantify their energy deposition contribution. The experiment consisted of a CH foam cylinder, inside an external coaxial magnetic field of 5 T, that was imploded using 36 OMEGA laser beams. Two-dimensional (2D) hydrodynamic modelling predicts the CH density reaches [Formula: see text], the temperature reaches 920 eV and the external B-field is amplified at maximum compression to 580 T. At pre-determined times during the compression, the intense OMEGA EP laser irradiated one end of the cylinder to accelerate relativistic electrons into the dense imploded plasma providing additional heating. The relativistic electron beam generation was simulated using a 2D particle-in-cell (PIC) code. Finally, three-dimensional hybrid-PIC simulations calculated the electron propagation and energy deposition inside the target and revealed the roles the compressed and self-generated B-fields play in transport. During a time window before the maximum compression time, the self-generated B-field on the compression front confines the injected electrons inside the target, increasing the temperature through Joule heating. For a stronger B-field seed of 20 T, the electrons are predicted to be guided into the compressed target and provide additional collisional heating. This article is part of a discussion meeting issue 'Prospects for high gain inertial fusion energy (part 2)'.
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Affiliation(s)
- D. Kawahito
- Center for Energy Research, University of California San Diego, La Jolla, CA 92093-0417, USA
| | - M. Bailly-Grandvaux
- Center for Energy Research, University of California San Diego, La Jolla, CA 92093-0417, USA
| | - M. Dozières
- Center for Energy Research, University of California San Diego, La Jolla, CA 92093-0417, USA
| | - C. McGuffey
- Center for Energy Research, University of California San Diego, La Jolla, CA 92093-0417, USA
| | - P. Forestier-Colleoni
- Center for Energy Research, University of California San Diego, La Jolla, CA 92093-0417, USA
| | - J. Peebles
- Laboratory for Laser Energetics, University of Rochester, Rochester, NY 14623, USA
| | - J. J. Honrubia
- E.T.S.I. Industriales, Universidad Politecnica de Madrid, Madrid 28040, Spain
| | - B. Khiar
- Office National d’Etudes et de Recherches Aérospatiales (ONERA), Palaiseau 91123, France
| | - S. Hansen
- Sandia National Laboratories, Albuquerque, NM 87185, USA
| | - P. Tzeferacos
- Laboratory for Laser Energetics, University of Rochester, Rochester, NY 14623, USA
- Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA
| | - M. S. Wei
- Laboratory for Laser Energetics, University of Rochester, Rochester, NY 14623, USA
- General Atomics, San Diego, CA 92186, USA
| | | | - P. Gourdain
- Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA
- Extreme State Physics Laboratory, University of Rochester, Rochester, NY 14627, USA
| | - J. R. Davies
- Laboratory for Laser Energetics, University of Rochester, Rochester, NY 14623, USA
| | - K. Matsuo
- Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - S. Fujioka
- Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - E. M. Campbell
- Laboratory for Laser Energetics, University of Rochester, Rochester, NY 14623, USA
| | - J. J. Santos
- Université de Bordeaux-CNRS-CEA, CELIA UMR, 5107 33400 Talence, France
| | - D. Batani
- Université de Bordeaux-CNRS-CEA, CELIA UMR, 5107 33400 Talence, France
| | - K. Bhutwala
- Center for Energy Research, University of California San Diego, La Jolla, CA 92093-0417, USA
| | - S. Zhang
- Center for Energy Research, University of California San Diego, La Jolla, CA 92093-0417, USA
| | - F. N. Beg
- Center for Energy Research, University of California San Diego, La Jolla, CA 92093-0417, USA
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13
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Law KFF, Abe Y, Morace A, Arikawa Y, Sakata S, Lee S, Matsuo K, Morita H, Ochiai Y, Liu C, Yogo A, Okamoto K, Golovin D, Ehret M, Ozaki T, Nakai M, Sentoku Y, Santos JJ, d'Humières E, Korneev P, Fujioka S. Relativistic magnetic reconnection in laser laboratory for testing an emission mechanism of hard-state black hole system. Phys Rev E 2020; 102:033202. [PMID: 33075864 DOI: 10.1103/physreve.102.033202] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 07/28/2020] [Indexed: 11/07/2022]
Abstract
Magnetic reconnection in a relativistic electron magnetization regime was observed in a laboratory plasma produced by a high-intensity, large energy, picoseconds laser pulse. Magnetic reconnection conditions realized with a laser-driven several kilotesla magnetic field is comparable to that in the accretion disk corona of black hole systems, i.e., Cygnus X-1. We observed particle energy distributions of reconnection outflow jets, which possess a power-law component in a high-energy range. The hardness of the observed spectra could explain the hard-state x-ray emission from accreting black hole systems.
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Affiliation(s)
- K F F Law
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan.,Department of Earth and Planetary Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Y Abe
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - A Morace
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Y Arikawa
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - S Sakata
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan.,Administration and Technology Center for Science and Engineering, Technology Management Division, Waseda University, 3-4-1 Okubo, Shinjyuku-ku, Tokyo 169-8555, Japan
| | - S Lee
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - K Matsuo
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan.,Center for Energy Research, University of California, San Diego, La Jolla, California 92093-0417, USA
| | - H Morita
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Y Ochiai
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - C Liu
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - A Yogo
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan.,PRESTO, Japan Science and Technology Agency, 4-1-8 Honmachi, Kawaguchi, Saitama 332-0012, Japan
| | - K Okamoto
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - D Golovin
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - M Ehret
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, Talence, France.,Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - T Ozaki
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-Cho, Toki, Gifu 509-5292, Japan
| | - M Nakai
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Y Sentoku
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - J J Santos
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, Talence, France
| | - E d'Humières
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, Talence, France
| | - Ph Korneev
- National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 31 Kashirskoe shosse, Moscow, 115409, Russian Federation.,P. N. Lebedev Physics Institute, Russian Academy of Sciences, 53 Leninskiy Prospekt, Moscow, 119991, Russian Federation
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
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14
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Gong T, Habara H, Sumioka K, Yoshimoto M, Hayashi Y, Kawazu S, Otsuki T, Matsumoto T, Minami T, Abe K, Aizawa K, Enmei Y, Fujita Y, Ikegami A, Makiyama H, Okazaki K, Okida K, Tsukamoto T, Arikawa Y, Fujioka S, Iwasa Y, Lee S, Nagatomo H, Shiraga H, Yamanoi K, Wei MS, Tanaka KA. Direct observation of imploded core heating via fast electrons with super-penetration scheme. Nat Commun 2019; 10:5614. [PMID: 31819056 PMCID: PMC6901506 DOI: 10.1038/s41467-019-13574-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Accepted: 11/08/2019] [Indexed: 11/09/2022] Open
Abstract
Fast ignition (FI) is a promising approach for high-energy-gain inertial confinement fusion in the laboratory. To achieve ignition, the energy of a short-pulse laser is required to be delivered efficiently to the pre-compressed fuel core via a high-energy electron beam. Therefore, understanding the transport and energy deposition of this electron beam inside the pre-compressed core is the key for FI. Here we report on the direct observation of the electron beam transport and deposition in a compressed core through the stimulated Cu Kα emission in the super-penetration scheme. Simulations reproducing the experimental measurements indicate that, at the time of peak compression, about 1% of the short-pulse energy is coupled to a relatively low-density core with a radius of 70 μm. Analysis with the support of 2D particle-in-cell simulations uncovers the key factors improving this coupling efficiency. Our findings are of critical importance for optimizing FI experiments in a super-penetration scheme.
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Affiliation(s)
- T Gong
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan.,Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang, Sichuan, 621900, People's Republic of China
| | - H Habara
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan.
| | - K Sumioka
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - M Yoshimoto
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Y Hayashi
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - S Kawazu
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - T Otsuki
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - T Matsumoto
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - T Minami
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - K Abe
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - K Aizawa
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Y Enmei
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Y Fujita
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - A Ikegami
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - H Makiyama
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - K Okazaki
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - K Okida
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - T Tsukamoto
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Y Arikawa
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Y Iwasa
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - S Lee
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - H Nagatomo
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - H Shiraga
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - K Yamanoi
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - M S Wei
- Laboratory for Laser Energetics, University of Rochester, Rochester, NY, 14623-1299, USA
| | - K A Tanaka
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan. .,Extreme Light Infrastructure: Nuclear Physics, 30 Reatorului, Magurele-Bucharest, 077125, Romania.
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15
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Tamaki K, Sato T, Tsugawa J, Fujioka S, Yagishita N, Araya N, Yamauchi J, Nagasaka M, Tsutsumi S, Yamano Y, Tsuboi Y. Cerebrospinal fluid CXCL10 as a surrogate marker of therapy-response and therapy-predict for HTLV-1-Associated myelopathy/tropical spastic paraparesis. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Morace A, Iwata N, Sentoku Y, Mima K, Arikawa Y, Yogo A, Andreev A, Tosaki S, Vaisseau X, Abe Y, Kojima S, Sakata S, Hata M, Lee S, Matsuo K, Kamitsukasa N, Norimatsu T, Kawanaka J, Tokita S, Miyanaga N, Shiraga H, Sakawa Y, Nakai M, Nishimura H, Azechi H, Fujioka S, Kodama R. Enhancing laser beam performance by interfering intense laser beamlets. Nat Commun 2019; 10:2995. [PMID: 31278266 PMCID: PMC6611939 DOI: 10.1038/s41467-019-10997-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 05/21/2019] [Indexed: 11/12/2022] Open
Abstract
Increasing the laser energy absorption into energetic particle beams represents a longstanding quest in intense laser-plasma physics. During the interaction with matter, part of the laser energy is converted into relativistic electron beams, which are the origin of secondary sources of energetic ions, γ-rays and neutrons. Here we experimentally demonstrate that using multiple coherent laser beamlets spatially and temporally overlapped, thus producing an interference pattern in the laser focus, significantly improves the laser energy conversion efficiency into hot electrons, compared to one beam with the same energy and nominal intensity as the four beamlets combined. Two-dimensional particle-in-cell simulations support the experimental results, suggesting that beamlet interference pattern induces a periodical shaping of the critical density, ultimately playing a key-role in enhancing the laser-to-electron energy conversion efficiency. This method is rather insensitive to laser pulse contrast and duration, making this approach robust and suitable to many existing facilities. Enhanced coupling of laser energy to the target particles is a fundamental issue in laser-plasma interactions. Here the authors demonstrate increased photon absorption leading into higher laser to electron and proton energy transfer through the interference of multiple coherent beamlets.
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Affiliation(s)
- A Morace
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan.
| | - N Iwata
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - Y Sentoku
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - K Mima
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - Y Arikawa
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - A Yogo
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - A Andreev
- Max Born Institute for non-linear optics and short pulse spectroscopy, Berlin, 12489, Germany.,St. Petersburg State University, Sankt-Petersburg, 199034, Russia
| | - S Tosaki
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - X Vaisseau
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - Y Abe
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - S Kojima
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - S Sakata
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - M Hata
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - S Lee
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - K Matsuo
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - N Kamitsukasa
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - T Norimatsu
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - J Kawanaka
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - S Tokita
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - N Miyanaga
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - H Shiraga
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - Y Sakawa
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - M Nakai
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - H Nishimura
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - H Azechi
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
| | - R Kodama
- Institute of Laser Engineering, Osaka University, Suita, 565-0871, Japan
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17
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Abe Y, Nakajima N, Sakaguchi Y, Arikawa Y, Mirfayzi SR, Fujioka S, Taguchi T, Mima K, Yogo A, Nishimura H, Shiraga H, Nakai M. A multichannel gated neutron detector with reduced afterpulse for low-yield neutron measurements in intense hard X-ray backgrounds. Rev Sci Instrum 2018; 89:10I114. [PMID: 30399813 DOI: 10.1063/1.5039436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 07/11/2018] [Indexed: 06/08/2023]
Abstract
A design of multichannel gated photomultiplier tube (PMT) is presented for the 960-channel neutron time-of-flight detector at the Institute of Laser Engineering of Osaka University. This is important for the fusion science and the nuclear photonics where intense hard X-rays are generated from the interaction of ultra-short laser pulse of petawatt power density with matter. The hard X-rays often overload PMTs and cause signal-induced background noises called afterpulses, making the detection of subsequent neutrons impossible. For this reason, the PMTs are coupled with an electrical time-gating (ETG) system to avoid overloading. The ETG system disables the PMT by modulating the dynode potential during the primary X-ray flash. An after-pulsing suppression technique is demonstrated by applying a reverse bias voltage between the photocathode and the first dynode. The presented multichannel scheme provides a gate response time of 80 ns, a signal cutoff ratio of 2.5 × 102, and requires reasonably low power consumption.
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Affiliation(s)
- Y Abe
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - N Nakajima
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | | | - Y Arikawa
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - S R Mirfayzi
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - T Taguchi
- Setsunan University, Osaka 572-8508, Japan
| | - K Mima
- Graduate School for the Creation of New Photonics Industries, Shizuoka 431-1202, Japan
| | - A Yogo
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - H Nishimura
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - H Shiraga
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - M Nakai
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
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18
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Arikawa Y, Matsubara S, Kishimoto H, Abe Y, Sakata S, Morace A, Mizutani R, Nishibata J, Yogo A, Nakai M, Shiraga H, Nishimura H, Fujioka S, Kodama R. A large-aperture high-sensitivity avalanche image intensifier panel. Rev Sci Instrum 2018; 89:10I128. [PMID: 30399964 DOI: 10.1063/1.5037623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Accepted: 06/19/2018] [Indexed: 06/08/2023]
Abstract
A large-aperture high-sensitivity image intensifier panel that consists of an avalanche photodiode array and a light-emitting diode array is presented. The device has 40% quantum efficiency, over 104 optical gain, and 80-ns time resolution. The aperture size of the device is 20 cm, and with the current manufacturing process, it can be scaled to arbitrarily larger sizes. The device can intensify the light from a single particle scintillation emission to an eye-visible bright flash. The image resolution of the device is currently limited by the size of the avalanche photodiode that is 2 mm, although it can be scaled to smaller sizes in the near future. The image intensifier is operated at a small voltage, typically +57 V. The device can be applied to various applications, such as scintillation imaging, night vision cameras, and an image converter from non-visible light (such as infrared or ultraviolet) to visible light.
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Affiliation(s)
- Y Arikawa
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, Japan
| | - S Matsubara
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, Japan
| | - H Kishimoto
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, Japan
| | - Y Abe
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, Japan
| | - S Sakata
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, Japan
| | - A Morace
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, Japan
| | - R Mizutani
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, Japan
| | - J Nishibata
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, Japan
| | - A Yogo
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, Japan
| | - M Nakai
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, Japan
| | - H Shiraga
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, Japan
| | - H Nishimura
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, Japan
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, Japan
| | - R Kodama
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, Japan
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19
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Bailly-Grandvaux M, Santos JJ, Bellei C, Forestier-Colleoni P, Fujioka S, Giuffrida L, Honrubia JJ, Batani D, Bouillaud R, Chevrot M, Cross JE, Crowston R, Dorard S, Dubois JL, Ehret M, Gregori G, Hulin S, Kojima S, Loyez E, Marquès JR, Morace A, Nicolaï P, Roth M, Sakata S, Schaumann G, Serres F, Servel J, Tikhonchuk VT, Woolsey N, Zhang Z. Guiding of relativistic electron beams in dense matter by laser-driven magnetostatic fields. Nat Commun 2018; 9:102. [PMID: 29317653 PMCID: PMC5760627 DOI: 10.1038/s41467-017-02641-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2016] [Accepted: 12/15/2017] [Indexed: 11/08/2022] Open
Abstract
Intense lasers interacting with dense targets accelerate relativistic electron beams, which transport part of the laser energy into the target depth. However, the overall laser-to-target energy coupling efficiency is impaired by the large divergence of the electron beam, intrinsic to the laser-plasma interaction. Here we demonstrate that an efficient guiding of MeV electrons with about 30 MA current in solid matter is obtained by imposing a laser-driven longitudinal magnetostatic field of 600 T. In the magnetized conditions the transported energy density and the peak background electron temperature at the 60-μm-thick target's rear surface rise by about a factor of five, as unfolded from benchmarked simulations. Such an improvement of energy-density flux through dense matter paves the ground for advances in laser-driven intense sources of energetic particles and radiation, driving matter to extreme temperatures, reaching states relevant for planetary or stellar science as yet inaccessible at the laboratory scale and achieving high-gain laser-driven thermonuclear fusion.
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Affiliation(s)
- M Bailly-Grandvaux
- Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405, Talence, France
| | - J J Santos
- Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405, Talence, France.
| | - C Bellei
- Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405, Talence, France
| | - P Forestier-Colleoni
- Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405, Talence, France
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - L Giuffrida
- Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405, Talence, France
| | - J J Honrubia
- ETSI Aeronáutica y del Espacio, Universidad Politécnica de Madrid, Plaza del Cardenal Cisneros 3, Madrid, 28040, Spain
| | - D Batani
- Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405, Talence, France
| | - R Bouillaud
- Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405, Talence, France
| | - M Chevrot
- LULI, UMR 7605, CNRS, Ecole Polytechnique, CEA, Université Paris-Saclay, UPMC: Sorbonne Universités, F-91128, Palaiseau cedex, France
| | - J E Cross
- Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK
| | - R Crowston
- Department of Physics, University of York, Heslington, YO10 5DD, UK
| | - S Dorard
- LULI, UMR 7605, CNRS, Ecole Polytechnique, CEA, Université Paris-Saclay, UPMC: Sorbonne Universités, F-91128, Palaiseau cedex, France
| | - J-L Dubois
- Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405, Talence, France
| | - M Ehret
- Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405, Talence, France
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstrasse 9, 64289, Darmstadt, Germany
| | - G Gregori
- Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK
| | - S Hulin
- Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405, Talence, France
| | - S Kojima
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - E Loyez
- LULI, UMR 7605, CNRS, Ecole Polytechnique, CEA, Université Paris-Saclay, UPMC: Sorbonne Universités, F-91128, Palaiseau cedex, France
| | - J-R Marquès
- LULI, UMR 7605, CNRS, Ecole Polytechnique, CEA, Université Paris-Saclay, UPMC: Sorbonne Universités, F-91128, Palaiseau cedex, France
| | - A Morace
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Ph Nicolaï
- Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405, Talence, France
| | - M Roth
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstrasse 9, 64289, Darmstadt, Germany
| | - S Sakata
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - G Schaumann
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstrasse 9, 64289, Darmstadt, Germany
| | - F Serres
- LULI, UMR 7605, CNRS, Ecole Polytechnique, CEA, Université Paris-Saclay, UPMC: Sorbonne Universités, F-91128, Palaiseau cedex, France
| | - J Servel
- Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405, Talence, France
| | - V T Tikhonchuk
- Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405, Talence, France
| | - N Woolsey
- Department of Physics, University of York, Heslington, YO10 5DD, UK
| | - Z Zhang
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
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Mishima T, Fujioka S, Yamaguchi Y, Hayashi Y, Onozawa R, Fukae J, Tsuboi Y. Role of anticholinergic medications in the treatment of Parkinson’s disease. Parkinsonism Relat Disord 2018. [DOI: 10.1016/j.parkreldis.2017.11.296] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Nose K, Fujioka S, Yoshida R, Hayashi Y, Kitano K, Maruyama S, Kikuchi H, Tsuboi Y. A potential therapeutic option for postural deformities in Parkinson disease. Parkinsonism Relat Disord 2018. [DOI: 10.1016/j.parkreldis.2017.11.298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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22
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Nose K, Nose K, Fujioka S, Mishima T, Higuchi M, Ouma S, Tsugawa J, Fukae J, Tsuboi Y. The prevalence of levodopa induced motor complications and the associated factors in Parkinson disease patients: Study in a Japanese single center for movement disorder. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Ogura H, Fujioka S, Mishima T, Tsugawa J, Fukae J, Tsuboi Y, Aoki M, Nabeshima K, Tsugu H. Comparison of pathology in MS and NMO with tumefactive demyelinating lesions. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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24
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Aoyagi R, Fujioka S, Mishima T, Tsuboi Y. Probable multiple system atrophy presenting motor fluctuation: Clinical characteristics in three cases. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.614] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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25
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Fujioka S, Kuramitsu S, Hiromasa T, Jinnouchi H, Morinaga T, Domei T, Hyodo M, Soga Y, Shirai S, Ando K. P3315Long-term efficacy and safety of biodegradable polymer biolimus-eluting vs. permanent polymer everolimus-eluting stents in diabetic Patients: 4-year clinical outcomes. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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26
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Vaisseau X, Morace A, Touati M, Nakatsutsumi M, Baton SD, Hulin S, Nicolaï P, Nuter R, Batani D, Beg FN, Breil J, Fedosejevs R, Feugeas JL, Forestier-Colleoni P, Fourment C, Fujioka S, Giuffrida L, Kerr S, McLean HS, Sawada H, Tikhonchuk VT, Santos JJ. Collimated Propagation of Fast Electron Beams Accelerated by High-Contrast Laser Pulses in Highly Resistive Shocked Carbon. Phys Rev Lett 2017; 118:205001. [PMID: 28581770 DOI: 10.1103/physrevlett.118.205001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Indexed: 06/07/2023]
Abstract
Collimated transport of ultrahigh intensity electron current was observed in cold and in laser-shocked vitreous carbon, in agreement with simulation predictions. The fast electron beams were created by coupling high-intensity and high-contrast laser pulses onto copper-coated cones drilled into the carbon samples. The guiding mechanism-observed only for times before the shock breakout at the inner cone tip-is due to self-generated resistive magnetic fields of ∼0.5-1 kT arising from the intense currents of fast electrons in vitreous carbon, by virtue of its specific high resistivity over the range of explored background temperatures. The spatial distribution of the electron beams, injected through the samples at different stages of compression, was characterized by side-on imaging of hard x-ray fluorescence.
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Affiliation(s)
- X Vaisseau
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France
| | - A Morace
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - M Touati
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France
- Department of Electrical Engineering, University of California Los Angeles, Los Angeles, California 90095, USA
| | - M Nakatsutsumi
- LULI-CNRS, Ecole Polytechnique, CEA, Université Paris-Saclay, F-91128 Palaiseau cedex, France
- Sorbonne Universités, UPMC Université Paris 06, CNRS, LULI, place Jussieu, 75252 Paris cedex 05, France
| | - S D Baton
- LULI-CNRS, Ecole Polytechnique, CEA, Université Paris-Saclay, F-91128 Palaiseau cedex, France
- Sorbonne Universités, UPMC Université Paris 06, CNRS, LULI, place Jussieu, 75252 Paris cedex 05, France
| | - S Hulin
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France
| | - Ph Nicolaï
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France
| | - R Nuter
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France
| | - D Batani
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France
| | - F N Beg
- University of California, San Diego, La Jolla, California 92093, USA
| | - J Breil
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France
| | - R Fedosejevs
- Department of Electrical and Computer Engineering, University of Alberta, Edmonton T6G 2G7, Canada
| | - J-L Feugeas
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France
| | - P Forestier-Colleoni
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France
| | - C Fourment
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - L Giuffrida
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France
| | - S Kerr
- Department of Electrical and Computer Engineering, University of Alberta, Edmonton T6G 2G7, Canada
| | - H S McLean
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - H Sawada
- University of Nevada, Reno, Nevada 89557, USA
| | - V T Tikhonchuk
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France
| | - J J Santos
- Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France
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27
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Goyon C, Pollock BB, Turnbull DP, Hazi A, Divol L, Farmer WA, Haberberger D, Javedani J, Johnson AJ, Kemp A, Levy MC, Grant Logan B, Mariscal DA, Landen OL, Patankar S, Ross JS, Rubenchik AM, Swadling GF, Williams GJ, Fujioka S, Law KFF, Moody JD. Ultrafast probing of magnetic field growth inside a laser-driven solenoid. Phys Rev E 2017; 95:033208. [PMID: 28415195 DOI: 10.1103/physreve.95.033208] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Indexed: 11/07/2022]
Abstract
We report on the detection of the time-dependent B-field amplitude and topology in a laser-driven solenoid. The B-field inferred from both proton deflectometry and Faraday rotation ramps up linearly in time reaching 210 ± 35 T at the end of a 0.75-ns laser drive with 1 TW at 351 nm. A lumped-element circuit model agrees well with the linear rise and suggests that the blow-off plasma screens the field between the plates leading to an increased plate capacitance that converts the laser-generated hot-electron current into a voltage source that drives current through the solenoid. ALE3D modeling shows that target disassembly and current diffusion may limit the B-field increase for longer laser drive. Scaling of these experimental results to a National Ignition Facility (NIF) hohlraum target size (∼0.2cm^{3}) indicates that it is possible to achieve several tens of Tesla.
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Affiliation(s)
- C Goyon
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - B B Pollock
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - D P Turnbull
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - A Hazi
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - L Divol
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - W A Farmer
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - D Haberberger
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
| | - J Javedani
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - A J Johnson
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - A Kemp
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - M C Levy
- Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - B Grant Logan
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - D A Mariscal
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - O L Landen
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - S Patankar
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - J S Ross
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - A M Rubenchik
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - G F Swadling
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - G J Williams
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - K F F Law
- Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - J D Moody
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
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Yogo A, Mima K, Iwata N, Tosaki S, Morace A, Arikawa Y, Fujioka S, Johzaki T, Sentoku Y, Nishimura H, Sagisaka A, Matsuo K, Kamitsukasa N, Kojima S, Nagatomo H, Nakai M, Shiraga H, Murakami M, Tokita S, Kawanaka J, Miyanaga N, Yamanoi K, Norimatsu T, Sakagami H, Bulanov SV, Kondo K, Azechi H. Boosting laser-ion acceleration with multi-picosecond pulses. Sci Rep 2017; 7:42451. [PMID: 28211913 PMCID: PMC5304168 DOI: 10.1038/srep42451] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 01/09/2017] [Indexed: 11/28/2022] Open
Abstract
Using one of the world most powerful laser facility, we demonstrate for the first time that high-contrast multi-picosecond pulses are advantageous for proton acceleration. By extending the pulse duration from 1.5 to 6 ps with fixed laser intensity of 1018 W cm-2, the maximum proton energy is improved more than twice (from 13 to 33 MeV). At the same time, laser-energy conversion efficiency into the MeV protons is enhanced with an order of magnitude, achieving 5% for protons above 6 MeV with the 6 ps pulse duration. The proton energies observed are discussed using a plasma expansion model newly developed that takes the electron temperature evolution beyond the ponderomotive energy in the over picoseconds interaction into account. The present results are quite encouraging for realizing ion-driven fast ignition and novel ion beamlines.
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Affiliation(s)
- A. Yogo
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
- PRESTO, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan
| | - K. Mima
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
- The Graduate School for the Creation of New Photon Industries, Hamamatsu, Shizuoka 431-1202, Japan
| | - N. Iwata
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
| | - S. Tosaki
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
| | - A. Morace
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
| | - Y. Arikawa
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
| | - S. Fujioka
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
| | - T. Johzaki
- Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8511, Japan
| | - Y. Sentoku
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
| | - H. Nishimura
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
| | - A. Sagisaka
- Kansai Photon Science Institute, National Institutes for Quantum and Radiological Science and Technology, Kizugawa 619-0215, Kyoto, Japan
| | - K. Matsuo
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
| | - N. Kamitsukasa
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
| | - S. Kojima
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
| | - H. Nagatomo
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
| | - M. Nakai
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
| | - H. Shiraga
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
| | - M. Murakami
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
| | - S. Tokita
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
| | - J. Kawanaka
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
| | - N. Miyanaga
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
| | - K. Yamanoi
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
| | - T. Norimatsu
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
| | - H. Sakagami
- National Institute for Fusion Science, Gifu 509-5292, Japan
| | - S. V. Bulanov
- Kansai Photon Science Institute, National Institutes for Quantum and Radiological Science and Technology, Kizugawa 619-0215, Kyoto, Japan
| | - K. Kondo
- Kansai Photon Science Institute, National Institutes for Quantum and Radiological Science and Technology, Kizugawa 619-0215, Kyoto, Japan
| | - H. Azechi
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
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Dulski J, Sołtan W, Schinwelski M, Rudzińska M, Wójcik-Pędziwiatr M, Wictor L, Schön F, Puschmann A, Klempíř J, Tilley L, Roth J, Tacik P, Fujioka S, Drozdowski W, Sitek E, Wszolek Z, Sławek J. Clinical variability of neuroacanthocytosis syndromes—a series of six patients with long follow-up. Clin Neurol Neurosurg 2016; 147:78-83. [DOI: 10.1016/j.clineuro.2016.05.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Revised: 02/28/2016] [Accepted: 05/29/2016] [Indexed: 11/26/2022]
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Kai Y, Hamada J, Morioka M, Ushio Y, Fujioka S. Foramen Magnum Dural Arteriovenous Fistulae with Repeated Subarachnoid Haemorrhage. Interv Neuroradiol 2016; 4:171-6. [DOI: 10.1177/159101999800400210] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/1998] [Accepted: 03/20/1998] [Indexed: 11/15/2022] Open
Abstract
We report a patient who had dural arteriovenous fistulae in the region of the foramen magnum with repeated subarachnoid haemorrhage. Magnetic resonance imaging revealed abnormal vascular structures on the right side of the medulla oblongata in an extra-axial portion. Angiographic findings showed that the lesion was supplied from the meningeal arteries and drained directly into the subarachnoid vein. There was venous dilatation. Embolisation was performed via the transarterial approach using a micro coil and liquid material. Three years after treatment, the patients' condition is good and follow-up angiograms confirmed the stability of the treatment outcome. While dural arteriovenous fistulae of the foramen magnum are rare, this malformation results in a high rate of bleeding and requires treatment.
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Affiliation(s)
| | | | | | | | - S. Fujioka
- Division of Neurosurgery, Kumamoto Saiseikai Hospital; Kumamoto, Japan
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31
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Sawada H, Fujioka S, Hosoda T, Zhang Z, Arikawa Y, Nagatomo H, Nishimura H, Sunahara A, Theobald W, Patel PK, Beg FN. Development of 4.5 keV monochromatic X-ray radiography using the high-energy, picosecond LFEX laser. ACTA ACUST UNITED AC 2016. [DOI: 10.1088/1742-6596/717/1/012112] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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32
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Shigemori K, Kato H, Nakai M, Hosogi R, Sakaiya T, Terasaki H, Fujioka S, Sunahara A, Azechi H. Mitigation of Laser Imprinting with Diamond Ablator for Direct-Drive Inertial Confinement Fusion Targets. ACTA ACUST UNITED AC 2016. [DOI: 10.1088/1742-6596/688/1/012107] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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33
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Johzaki T, Mima K, Fujioka S, Sakagami H, Sunahara A, Nagatomo H, Shiraga H. Electron beam guiding by strong longitudinal magnetic fields. ACTA ACUST UNITED AC 2016. [DOI: 10.1088/1742-6596/688/1/012041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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34
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Furukawa M, Kina S, Shiroma M, Shiroma Y, Masuda N, Motomura D, Hiraoka H, Fujioka S, Kawakami T, Yasuda Y, Arakawa K, Fukahori K, Jyunicho M, Ishikawa S, Ohomoto T, Shingaki R, Akata N, Zhuo W, Tokonami S. Terrestrial gamma radiation dose rate in Ryukyu Islands, subtropical region of Japan. Radiat Prot Dosimetry 2015; 167:223-227. [PMID: 26065703 DOI: 10.1093/rpd/ncv249] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In order to explain the distribution of natural radiation level in the Asia, in situ measurements of dose rate in air due to terrestrial gamma radiation have been conducted in a total of 21 islands that belong to Ryukyu Islands (Ryukyu Archipelago), subtropical rejoin of southwest Japan. Car-borne surveys have also been carried out in Okinawa-jima, the biggest island of the archipelago. Based on the results for these measurements, arithmetic mean, the maximum and the minimum of the dose rates at 1 m in height from the unpaved soil ground in the archipelago were estimated to be 47, 165 and 8 nGy h(-1), respectively. A comparative study of car-borne data obtained prior to and subsequent to the 2011 Fukushima nuclear accident, as for Okinawa-jima, indicated that the nuclear accident has no impact on the environmental radiation at the present time.
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Affiliation(s)
- M Furukawa
- Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213, Japan
| | - S Kina
- Graduate School of Engineering and Sciences, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213, Japan
| | - M Shiroma
- Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213, Japan
| | - Y Shiroma
- Graduate School of Engineering and Sciences, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213, Japan
| | - N Masuda
- Graduate School of Engineering and Sciences, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213, Japan
| | - D Motomura
- Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213, Japan
| | - H Hiraoka
- Graduate School of Engineering and Sciences, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213, Japan
| | - S Fujioka
- Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213, Japan
| | - T Kawakami
- Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213, Japan
| | - Y Yasuda
- Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213, Japan
| | - K Arakawa
- Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213, Japan
| | - K Fukahori
- Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213, Japan
| | - M Jyunicho
- Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213, Japan
| | - S Ishikawa
- Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213, Japan
| | - T Ohomoto
- Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213, Japan
| | - R Shingaki
- Graduate School of Engineering and Sciences, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213, Japan
| | - N Akata
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu 509-5292, Japan
| | - W Zhuo
- Institute of Radiation Medicine, Fudan University, No. 2094, Xietu Road, Shanghai 200032, China
| | - S Tokonami
- Institute of Radiation Emergency Medicine, Hirosaki University, 66-1 Hon-cho, Hirosaki-shi, Aomori 036-8564, Japan
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35
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Shimaoka T, Kaneko JH, Arikawa Y, Isobe M, Sato Y, Tsubota M, Nagai T, Kojima S, Abe Y, Sakata S, Fujioka S, Nakai M, Shiraga H, Azechi H, Chayahara A, Umezawa H, Shikata S. Response measurement of single-crystal chemical vapor deposition diamond radiation detector for intense X-rays aiming at neutron bang-time and neutron burn-history measurement on an inertial confinement fusion with fast ignition. Rev Sci Instrum 2015; 86:053503. [PMID: 26026521 DOI: 10.1063/1.4921482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A neutron bang time and burn history monitor in inertial confinement fusion with fast ignition are necessary for plasma diagnostics. In the FIREX project, however, no detector attained those capabilities because high-intensity X-rays accompanied fast electrons used for plasma heating. To solve this problem, single-crystal CVD diamond was grown and fabricated into a radiation detector. The detector, which had excellent charge transportation property, was tested to obtain a response function for intense X-rays. The applicability for neutron bang time and burn history monitor was verified experimentally. Charge collection efficiency of 99.5% ± 0.8% and 97.1% ± 1.4% for holes and electrons were obtained using 5.486 MeV alpha particles. The drift velocity at electric field which saturates charge collection efficiency was 1.1 ± 0.4 × 10(7) cm/s and 1.0 ± 0.3 × 10(7) cm/s for holes and electrons. Fast response of several ns pulse width for intense X-ray was obtained at the GEKKO XII experiment, which is sufficiently fast for ToF measurements to obtain a neutron signal separately from X-rays. Based on these results, we confirmed that the single-crystal CVD diamond detector obtained neutron signal with good S/N under ion temperature 0.5-1 keV and neutron yield of more than 10(9) neutrons/shot.
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Affiliation(s)
- T Shimaoka
- Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - J H Kaneko
- Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Y Arikawa
- Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan
| | - M Isobe
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - Y Sato
- The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - M Tsubota
- Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - T Nagai
- Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan
| | - S Kojima
- Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan
| | - Y Abe
- Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan
| | - S Sakata
- Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan
| | - S Fujioka
- Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan
| | - M Nakai
- Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan
| | - H Shiraga
- Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan
| | - H Azechi
- Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan
| | - A Chayahara
- Diamond Research Laboratory, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
| | - H Umezawa
- Diamond Research Laboratory, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
| | - S Shikata
- Diamond Research Laboratory, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
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36
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Kishimoto H, Tsumura K, Fujioka S, Uchimoto S, Yamashita N, Suzuki R, Yoshimaru K, Shimura M, Sasakawa O, Morii H. Effects of parathyroid hormone-related protein on systemic and regional hemodynamics in conscious rats. A comparison with human parathyroid hormone. Contrib Nephrol 2015; 90:72-8. [PMID: 1959358 DOI: 10.1159/000420126] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
PTHrp was discovered as a humoral hypercalcemic factor of malignancy and has been shown to bind the same receptor as PTH in rat bone cells, canine renal membranes, and rabbit renal microvessels. We investigated the global effect of human PTH(hPTH) and PTHrp on systemic and regional hemodynamics in conscious rats. The hypotensive response to PTHrp was more potent than that to hPTH. Although hPTH (15 micrograms/kg/min, i.v.) caused a significant increase in cardiac output, whereas PTHrp (5 micrograms/kg/min, i.v.) caused no change in cardiac output despite a similar hypotensive effect to hPTH, the effects of PTHrp and hPTHrp on regional hemodynamics were quite similar, and both peptides had a prominent vasodilatory effect on the coronary and hepatic arteries. Therefore, PTHrp appears to have an important role in blood pressure and regional hemodynamics as does hPTH.
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Affiliation(s)
- H Kishimoto
- Second Department of Internal Medicine, Osaka City University Medical School, Japan
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37
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Sakata S, Arikawa Y, Kojima S, Ikenouchi T, Nagai T, Abe Y, Inoue H, Morace A, Utsugi M, Kato R, Nishimura H, Nakai M, Shiraga H, Fujioka S, Azechi H. Photonuclear reaction based high-energy x-ray spectrometer to cover from 2 MeV to 20 MeV. Rev Sci Instrum 2014; 85:11D629. [PMID: 25430205 DOI: 10.1063/1.4893943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A photonuclear-reaction-based hard x-ray spectrometer is developed to measure the number and energy spectrum of fast electrons generated by interactions between plasma and intense laser light. In this spectrometer, x-rays are converted to neutrons through photonuclear reactions, and the neutrons are counted with a bubble detector that is insensitive to x-rays. The spectrometer consists of a bundle of hard x-ray detectors that respond to different photon-energy ranges. Proof-of-principle experiment was performed on a linear accelerator facility. A quasi-monoenergetic electron bunch (Ne = 1.0 × 10(-6) C, Ee = 16 ± 0.32 MeV) was injected into a 5-mm-thick lead plate. Bremsstrahlung x-rays, which emanate from the lead plate, were measured with the spectrometer. The measured spectral shape and intensity agree fairly well with those computed with a Monte Carlo simulation code. The result shows that high-energy x-rays can be measured absolutely with a photon-counting accuracy of 50%-70% in the energy range from 2 MeV to 20 MeV with a spectral resolution (Δhν/hν) of about 15%. Quantum efficiency of this spectrometer was designed to be 10(-7), 10(-4), 10(-5), respectively, for 2-10, 11-15, and 15-25 MeV of photon energy ranges.
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Affiliation(s)
- S Sakata
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Japan
| | - Y Arikawa
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Japan
| | - S Kojima
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Japan
| | - T Ikenouchi
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Japan
| | - T Nagai
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Japan
| | - Y Abe
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Japan
| | - H Inoue
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Japan
| | - A Morace
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Japan
| | - M Utsugi
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Japan
| | - R Kato
- Institute of Scientific and Industrial Research, Osaka University, Ibaraki 565-0047, Japan
| | - H Nishimura
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Japan
| | - M Nakai
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Japan
| | - H Shiraga
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Japan
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Japan
| | - H Azechi
- Institute of Laser Engineering, Osaka University, Suita 565-0871, Japan
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38
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Arikawa Y, Nagai T, Abe Y, Kojima S, Sakata S, Inoue H, Utsugi M, Iwasa Y, Murata T, Sarukura N, Nakai M, Shiraga H, Fujioka S, Azechi H. Development of multichannel low-energy neutron spectrometer. Rev Sci Instrum 2014; 85:11E125. [PMID: 25430304 DOI: 10.1063/1.4895826] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A multichannel low-energy neutron spectrometer for down-scattered neutron (DSN) measurements in inertial confinement fusion (ICF) experiments has been developed. Our compact-size 256-channel lithium-glass-scintillator-based spectrometer has been implemented and tested in ICF experiments with the GEKKO XII laser. We have performed time calibration of the 256-channel analog-to-digital convertor system used for DSN measurements via X-ray pulse signals. We have clearly observed the DD-primary fusion neutron signal and have successfully studied the detector's impulse response. Our detector is soon to be implemented in future ICF experiments.
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Affiliation(s)
- Y Arikawa
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, Japan
| | - T Nagai
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, Japan
| | - Y Abe
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, Japan
| | - S Kojima
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, Japan
| | - S Sakata
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, Japan
| | - H Inoue
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, Japan
| | - M Utsugi
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, Japan
| | - Y Iwasa
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, Japan
| | - T Murata
- Kumamoto University, 2-40-1 Kurokami, Kumamoto 860-8555, Japan
| | - N Sarukura
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, Japan
| | - M Nakai
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, Japan
| | - H Shiraga
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, Japan
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, Japan
| | - H Azechi
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, Japan
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39
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Ozaki T, Kojima S, Arikawa Y, Shiraga H, Sakagami H, Fujioka S, Kato R. An electron/ion spectrometer with the ability of low energy electron measurement for fast ignition experiments. Rev Sci Instrum 2014; 85:11E113. [PMID: 25430292 DOI: 10.1063/1.4891043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
An electron energy spectrometer (ESM) is one of the most fundamental diagnostics in the fast ignition experiment. It is necessary to observe the spectra down to a low energy range in order to obtain the accurate deposition efficiency toward the core. Here, we realize the suitable ESM by using a ferrite magnet with a moderate magnetic field of 0.3 T and a rectangular magnetic circuit covered with a steel plate in the inlet side.
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Affiliation(s)
- T Ozaki
- National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu 509-5292, Japan
| | - S Kojima
- Institute of Laser Engineering, Osaka University, 2-6, Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Y Arikawa
- Institute of Laser Engineering, Osaka University, 2-6, Yamada-oka, Suita, Osaka 565-0871, Japan
| | - H Shiraga
- Institute of Laser Engineering, Osaka University, 2-6, Yamada-oka, Suita, Osaka 565-0871, Japan
| | - H Sakagami
- National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu 509-5292, Japan
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, 2-6, Yamada-oka, Suita, Osaka 565-0871, Japan
| | - R Kato
- Institute of Scientific and Industrial Research, Osaka University, 8-1, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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40
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Abe Y, Hosoda H, Arikawa Y, Nagai T, Kojima S, Sakata S, Inoue H, Iwasa Y, Iwano K, Yamanoi K, Fujioka S, Nakai M, Sarukura N, Shiraga H, Norimatsu T, Azechi H. Characterizing a fast-response, low-afterglow liquid scintillator for neutron time-of-flight diagnostics in fast ignition experiments. Rev Sci Instrum 2014; 85:11E126. [PMID: 25430305 DOI: 10.1063/1.4896957] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The characteristics of oxygen-enriched liquid scintillators with very low afterglow are investigated and optimized for application to a single-hit neutron spectrometer for fast ignition experiments. It is found that 1,2,4-trimethylbenzene has better characteristics as a liquid scintillator solvent than the conventional solvent, p-xylene. In addition, a benzophenon-doped BBQ liquid scintillator is shown to demonstrate very rapid time response, and therefore has potential for further use in neutron diagnostics with fast time resolution.
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Affiliation(s)
- Y Abe
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - H Hosoda
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Y Arikawa
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - T Nagai
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - S Kojima
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - S Sakata
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - H Inoue
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Y Iwasa
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - K Iwano
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - K Yamanoi
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - M Nakai
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - N Sarukura
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - H Shiraga
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - T Norimatsu
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - H Azechi
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
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41
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Fujioka S, Esaki M, Fujiyama A, Tsuruya K, Matsumoto T, Kitazono T. Education and imaging. Gastrointestinal: Inadvertent ingestion of press-through package in small intestine detected by capsule endoscopy. J Gastroenterol Hepatol 2014; 29:1128. [PMID: 24832779 DOI: 10.1111/jgh.12586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- S Fujioka
- Departments of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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42
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Shiraga H, Fujioka S, Nakai M, Watari T, Nakamura H, Arikawa Y, Hosoda H, Nagai T, Koga M, Kikuchi H, Ishii Y, Sogo T, Shigemori K, Nishimura H, Zhang Z, Tanabe M, Ohira S, Fujii Y, Namimoto T, Sakawa Y, Maegawa O, Ozaki T, Tanaka K, Habara H, Iwawaki T, Shimada K, Key M, Norreys P, Pasley J, Nagatomo H, Johzaki T, Sunahara A, Murakami M, Sakagami H, Taguchi T, Norimatsu T, Homma H, Fujimoto Y, Iwamoto A, Miyanaga N, Kawanaka J, Kanabe T, Jitsuno T, Nakata Y, Tsubakimoto K, Sueda K, Kodama R, Kondo K, Morio N, Matsuo S, Kawasaki T, Sawai K, Tsuji K, Murakami H, Sarukura N, Shimizu T, Mima K, Azechi H. Implosion and heating experiments of fast ignition targets by Gekko-XII and LFEX lasers. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20135901008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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43
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Koga M, Ishii Y, Sogo T, Shigemori K, Shiraga H, Fujioka S, Azechi H. High-resolution X-ray imaging in fast ignition experiment using Gekko and LFEX lasers. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20135903006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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44
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Johzaki T, Sunahara A, Fujioka S, Nagatomo H, Sakagami H, Mima K. Fast electron beam guiding for effective core heating. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20135903010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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45
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Kadono T, Sakaiya T, Hironaka Y, Nagatomo H, Sano T, Watari T, Otani K, Fujiwara T, Mochiyama T, Fujioka S, Shigemori K, Yabuta H, Kondo T, Arakawa M, Nakamura A, Kurosawa K, Sugita S, Ohno S, Matsui T. Flyer acceleration experiments using high-power laser. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20135919002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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46
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Zhang Z, Nishimura H, Nishikino M, Sunahara A, Johzaki T, Cai H, Kawachi T, Pirozhkov A, Sagisaka A, Orimo S, Ogura K, Yogo A, Okano Y, Ohshima S, Fujioka S, Kiriyama H, Kondo K, Shimomura T, Kanazawa S. Efficient multi-keV X-ray generation from high-contrast laser plasma interaction. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20135918003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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47
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Nishimura H, Zhang Z, Namimoto T, Fujioka S, Koga M, Shiraga H, Ozaki T, Iwawaki T, Morioka T, Morita K, Habara H, Tanaka K, Nishikino M, Kawachi T, Sagisaka A, Orimo S, Pirozhkov A, Ogura K, Yogo A, Kiriyama H, Kondo K, Shimomura T, Kanazawa S, Okano Y, Azechi H. Absolute Kα line spectroscopy for cone-guided fast-ignition targets. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20135913008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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48
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Fujioka S, Kobori H. Prediction of Therapeutic Effect of Hormonotherapy for Endometrial Cyst by Diffusion-Weighted Imaging. J Minim Invasive Gynecol 2012. [DOI: 10.1016/j.jmig.2012.08.355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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49
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Yokoyama A, Kohno N, Fujino S, Hamada H, Inoue Y, Fujioka S, Hiwada K. Origin of heterogeneity of interleukin-6 (IL-6) levels in malignant pleural effusions. Oncol Rep 2012; 1:507-11. [PMID: 21607393 DOI: 10.3892/or.1.3.507] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
We measured interleukin-6 (IL-6) concentrations from 48 malignant pleural effusions by an enzyme immunoassay and found a marked heterogeneity of the concentrations. The histological type of the malignant cells and total counts or differentials of the cells in effusions could not account for the heterogeneity. We newly established five malignant cell lines and found that the amounts of IL-6 produced by them were well correlated with IL-6 concentrations of the effusions from which these lines were derived (r=0.96; p<0.01). These results suggest that a marked heterogeneity of IL-6 concentrations in malignant effusions reflects the differential production of IL-6 by malignant cells in pleural space.
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50
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Arikawa Y, Nagai T, Hosoda H, Abe Y, Kojima S, Fujioka S, Sarukura N, Nakai M, Shiraga H, Ozaki T, Azechi H. The photonuclear neutron and gamma-ray backgrounds in the fast ignition experiment. Rev Sci Instrum 2012; 83:10D909. [PMID: 23126912 DOI: 10.1063/1.4732180] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In the fast-ignition scheme, very hard x-rays (hereinafter referred to as γ-rays) are generated by Bremsstrahlung radiation from fast electrons. Significant backgrounds were observed around the deuterium-deuterium fusion neutron signals in the experiment in 2010. In this paper the backgrounds were studied in detail, based on Monte Carlo simulations, and they were confirmed to be γ-rays from the target, scattered γ-rays from the experimental bay walls (γ'-rays), and neutrons generated by (γ, n) reactions in either the target vacuum chamber or the diagnostic instruments (γ-n neutrons).
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Affiliation(s)
- Y Arikawa
- Institute of Laser Engineering, Osaka University, Yamadaoka Suita, Japan.
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