1
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Sio H, Krygier A, Braun DG, Rudd RE, Bonev SA, Coppari F, Millot M, Fratanduono DE, Bhandarkar N, Bitter M, Bradley DK, Efthimion PC, Eggert JH, Gao L, Hill KW, Hood R, Hsing W, Izumi N, Kemp G, Kozioziemski B, Landen OL, Le Galloudec K, Lockard TE, Mackinnon A, McNaney JM, Ose N, Park HS, Remington BA, Schneider MB, Stoupin S, Thorn DB, Vonhof S, Wu CJ, Ping Y. Extended X-ray absorption fine structure of dynamically-compressed copper up to 1 terapascal. Nat Commun 2023; 14:7046. [PMID: 37949859 PMCID: PMC10638371 DOI: 10.1038/s41467-023-42684-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 10/18/2023] [Indexed: 11/12/2023] Open
Abstract
Large laser facilities have recently enabled material characterization at the pressures of Earth and Super-Earth cores. However, the temperature of the compressed materials has been largely unknown, or solely relied on models and simulations, due to lack of diagnostics under these challenging conditions. Here, we report on temperature, density, pressure, and local structure of copper determined from extended x-ray absorption fine structure and velocimetry up to 1 Terapascal. These results nearly double the highest pressure at which extended x-ray absorption fine structure has been reported in any material. In this work, the copper temperature is unexpectedly found to be much higher than predicted when adjacent to diamond layer(s), demonstrating the important influence of the sample environment on the thermal state of materials; this effect may introduce additional temperature uncertainties in some previous experiments using diamond and provides new guidance for future experimental design.
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Affiliation(s)
- H Sio
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA.
| | - A Krygier
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - D G Braun
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - R E Rudd
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - S A Bonev
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - F Coppari
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - M Millot
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - D E Fratanduono
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - N Bhandarkar
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - M Bitter
- Princeton Plasma Physics Laboratory, Princeton University, 100 Stellarator Rd, Princeton, NJ, 08540, USA
| | - D K Bradley
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - P C Efthimion
- Princeton Plasma Physics Laboratory, Princeton University, 100 Stellarator Rd, Princeton, NJ, 08540, USA
| | - J H Eggert
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - L Gao
- Princeton Plasma Physics Laboratory, Princeton University, 100 Stellarator Rd, Princeton, NJ, 08540, USA
| | - K W Hill
- Princeton Plasma Physics Laboratory, Princeton University, 100 Stellarator Rd, Princeton, NJ, 08540, USA
| | - R Hood
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - W Hsing
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - N Izumi
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - G Kemp
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - B Kozioziemski
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - O L Landen
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - K Le Galloudec
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - T E Lockard
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - A Mackinnon
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - J M McNaney
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - N Ose
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - H-S Park
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - B A Remington
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - M B Schneider
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - S Stoupin
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - D B Thorn
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - S Vonhof
- General Atomics, 3550 General Atomics Court, San Diego, CA, 92121, USA
| | - C J Wu
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - Y Ping
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
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2
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Chin DA, Nilson PM, Mastrosimone D, Guy D, Ruby JJ, Bishel DT, Seely JF, Coppari F, Ping Y, Rygg JR, Collins GW. High-resolution x-ray spectrometer for x-ray absorption fine structure spectroscopy. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2023; 94:013101. [PMID: 36725595 DOI: 10.1063/5.0125712] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 12/04/2022] [Indexed: 05/26/2023]
Abstract
Two extended x-ray absorption fine structure flat crystal x-ray spectrometers (EFX's) were designed and built for high-resolution x-ray spectroscopy over a large energy range with flexible, on-shot energy dispersion calibration capabilities. The EFX uses a flat silicon [111] crystal in the reflection geometry as the energy dispersive optic covering the energy range of 6.3-11.4 keV and achieving a spectral resolution of 4.5 eV with a source size of 50 μm at 7.2 keV. A shot-to-shot configurable calibration filter pack and Bayesian inference routine were used to constrain the energy dispersion relation to within ±3 eV. The EFX was primarily designed for x-ray absorption fine structure (XAFS) spectroscopy and provides significant improvement to the Laboratory for Laser Energetics' OMEGA-60 XAFS experimental platform. The EFX is capable of performing extended XAFS measurements of multiple absorption edges simultaneously on metal alloys and x-ray absorption near-edge spectroscopy to measure the electron structure of compressed 3d transition metals.
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Affiliation(s)
- D A Chin
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA
| | - P M Nilson
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - D Mastrosimone
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - D Guy
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - J J Ruby
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D T Bishel
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA
| | - J F Seely
- Syntek Technologies, Fairfax, Virginia 22031, USA
| | - F Coppari
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - Y Ping
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J R Rygg
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA
| | - G W Collins
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA
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3
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Bitter M, Pablant N, Hill KW, Gao L, Kraus B, Efthimion PC, Delgado-Apericio L, Stratton B, Schneider M, Coppari F, Kauffman R, MacDonald MJ, MacPhee A, Ping Y, Stoupin S, Thorn D. A new class of focusing crystal shapes for Bragg spectroscopy of small, point-like, x-ray sources in laser produced plasmas. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2021; 92:043531. [PMID: 34243385 DOI: 10.1063/5.0043599] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Accepted: 03/22/2021] [Indexed: 06/13/2023]
Abstract
This paper describes a new class of focusing crystal forms for the x-ray Bragg crystal spectroscopy of small, point-like, x-ray sources. These new crystal forms are designed with the aid of sinusoidal spirals, a family of curves, whose shapes are defined by only one parameter, which can assume any real value. The potential of the sinusoidal spirals for the design x-ray crystal spectrometers is demonstrated with the design of a toroidally bent crystal of varying major and minor radii for measurements of the extended x-ray absorption fine structure near the Ta-L3 absorption edge at the National Ignition Facility.
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Affiliation(s)
- M Bitter
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - N Pablant
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - K W Hill
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - Lan Gao
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - B Kraus
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - P C Efthimion
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | | | - B Stratton
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - M Schneider
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - F Coppari
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R Kauffman
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M J MacDonald
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A MacPhee
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - Y Ping
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S Stoupin
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D Thorn
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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4
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Das P, Klug JA, Sinclair N, Wang X, Toyoda Y, Li Y, Williams B, Schuman A, Zhang J, Turneaure SJ. Single-pulse (100 ps) extended x-ray absorption fine structure capability at the Dynamic Compression Sector. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2020; 91:085115. [PMID: 32872941 DOI: 10.1063/5.0003427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Accepted: 08/02/2020] [Indexed: 06/11/2023]
Abstract
Determining real-time changes in the local atomistic order is important for a mechanistic understanding of shock wave induced structural and chemical changes. However, the single event and short duration (nanosecond times) nature of shock experiments pose challenges in obtaining Extended X-ray Absorption Fine Structure (EXAFS) measurements-typically used for monitoring local order changes. Here, we report on a new single pulse (∼100 ps duration) transmission geometry EXAFS capability for use in laser shock-compression experiments at the Dynamic Compression Sector (DCS), Advanced Photon Source. We used a flat plate of highly oriented pyrolytic graphite (HOPG) as the spectrometer element to energy disperse x rays transmitted through the sample. It provided high efficiency with ∼15% of the x rays incident on the HOPG reaching an x-ray area detector with high quantum efficiency. This combination resulted in a good signal-to-noise ratio (∼103), an energy resolution of ∼10 eV at 10 keV, EXAFS spectra covering 100 s of eV, and a good pulse to pulse reproducibility of our single pulse measurements. Ambient EXAFS spectra for Cu and Au are compared to the reference spectra, validating our measurement system. Comparison of single pulse EXAFS results for ambient and laser shocked Ge(100) shows large changes in the local structure of the short lived state of shocked Ge. The current DCS EXAFS capability can be used to perform single pulse measurements in laser shocked materials from ∼9 keV to 13 keV. These EXAFS developments will be available to all users of the DCS.
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Affiliation(s)
- Pinaki Das
- Dynamic Compression Sector, Institute for Shock Physics, Washington State University, Argonne, Illinois 60439, USA
| | - Jeffrey A Klug
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Nicholas Sinclair
- Dynamic Compression Sector, Institute for Shock Physics, Washington State University, Argonne, Illinois 60439, USA
| | - Xiaoming Wang
- Dynamic Compression Sector, Institute for Shock Physics, Washington State University, Argonne, Illinois 60439, USA
| | - Yoshimasa Toyoda
- Institute for Shock Physics, Washington State University, Pullman, Washington 99164, USA
| | - Yuelin Li
- Dynamic Compression Sector, Institute for Shock Physics, Washington State University, Argonne, Illinois 60439, USA
| | - Brendan Williams
- Dynamic Compression Sector, Institute for Shock Physics, Washington State University, Argonne, Illinois 60439, USA
| | - Adam Schuman
- Dynamic Compression Sector, Institute for Shock Physics, Washington State University, Argonne, Illinois 60439, USA
| | - Jun Zhang
- Dynamic Compression Sector, Institute for Shock Physics, Washington State University, Argonne, Illinois 60439, USA
| | - Stefan J Turneaure
- Institute for Shock Physics, Washington State University, Pullman, Washington 99164, USA
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5
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Do A, Coppari F, Ping Y, Krygier A, Kemp GE, Schneider MB, McNaney JM. Foil backlighter development at the OMEGA laser facility for extended x-ray absorption fine structure experiments. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2020; 91:086101. [PMID: 32872967 DOI: 10.1063/5.0015313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 07/19/2020] [Indexed: 06/11/2023]
Abstract
Extended x-ray absorption fine structure (EXAFS) measurements require a bright and continuous x-ray source and a detection system with high spectral resolution to capture the modulations of the absorption coefficient above the material absorption edge. When performing EXAFS measurements under laser-driven dynamic compression, it is hence critical to optimize the backlighter x-ray emission. A series of experiments has been conducted at the OMEGA laser facility to characterize titanium (Z = 22), iron (Z = 26), germanium (Z = 32), molybdenum (Z = 42), silver (Z = 47), and gold (Z = 79) foil backlighters irradiated with 3 kJ-12 kJ of laser energy. The spectra have been recorded using a dual crystal spectrometer (DCS), a two-channel transmission spectrometer covering 11 keV-45 keV and 19 keV-90 keV energy bands. The DCS has been calibrated so that the spectral intensities can be compared between different campaigns.
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Affiliation(s)
- A Do
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - F Coppari
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - Y Ping
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Krygier
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - G E Kemp
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M B Schneider
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J M McNaney
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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6
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Jiang S, Lazicki AE, Hansen SB, Sterne PA, Grabowski P, Shepherd R, Scott HA, Smith RF, Eggert JH, Ping Y. Measurements of pressure-induced Kβ line shifts in ramp compressed cobalt up to 8 Mbar. Phys Rev E 2020; 101:023204. [PMID: 32168658 DOI: 10.1103/physreve.101.023204] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 12/17/2019] [Indexed: 11/07/2022]
Abstract
We report measurements of K-shell fluorescence lines induced by fast electrons in ramp-compressed Co targets. The fluorescence emission was stimulated by fast electrons generated through short-pulse laser-solid interaction with an Al target layer. Compression up to 2.1× solid density was achieved while maintaining temperatures well below the Fermi energy, effectively removing the thermal effects from consideration. We observed small but unambiguous redshifts in the Kβ fluorescence line relative to unshifted Cu Kα. Redshifts up to 2.6 eV were found to increase with compression and to be consistent with predictions from self-consistent models based on density-functional theory.
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Affiliation(s)
- S Jiang
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A E Lazicki
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S B Hansen
- Sandia National Laboratory, Albuquerque, New Mexico 87185, USA
| | - P A Sterne
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - P Grabowski
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R Shepherd
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - H A Scott
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R F Smith
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J H Eggert
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - Y Ping
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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7
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Bitter M, Hill KW, Gao L, Kraus BF, Efthimion PC, Delgado-Aparicio L, Pablant N, Stratton B, Schneider M, Coppari F, Kauffman R, MacPhee AG, Ping Y, Thorn D. A new toroidal x-ray crystal spectrometer for the diagnosis of high energy density plasmas at the National Ignition Facility. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:10F118. [PMID: 30399766 DOI: 10.1063/1.5036806] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 06/27/2018] [Indexed: 06/08/2023]
Abstract
The here-described spectrometer was developed for the extended x-ray absorption fine structure spectroscopy of high-density plasmas at the National Ignition Facility. It employs as the Bragg reflecting element a new type of toroidally bent crystal with a constant and very large major radius R and a much smaller, locally varying, minor radius r. The focusing properties of this crystal and the experimental arrangement of the source and detector make it possible to (a) fulfill the conditions for a perfect imaging of an ideal point source for each wavelength, (b) obtain a high photon throughput, (c) obtain a high spectral resolution by eliminating the effects of source-size broadening, and (d) obtain a one-dimensional spatial resolution with a high magnification perpendicular to the main dispersion plane.
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Affiliation(s)
- M Bitter
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - K W Hill
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - Lan Gao
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - B F Kraus
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - P C Efthimion
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | | | - N Pablant
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - B Stratton
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - M Schneider
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - F Coppari
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R Kauffman
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A G MacPhee
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - Y Ping
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D Thorn
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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8
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Krygier A, Coppari F, Kemp GE, Thorn DB, Craxton RS, Eggert JH, Garcia EM, McNaney JM, Park HS, Ping Y, Remington BA, Schneider MB. Developing a high-flux, high-energy continuum backlighter for extended x-ray absorption fine structure measurements at the National Ignition Facility. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:10F114. [PMID: 30399955 DOI: 10.1063/1.5038669] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 06/19/2018] [Indexed: 06/08/2023]
Abstract
Extended X-ray absorption fine structure (EXAFS) spectroscopy is a powerful tool for in situ characterization of matter in the high energy density regime. An EXAFS platform is currently being developed on the National Ignition Facility. Development of a suitable X-ray backlighter involves minimizing the temporal duration and source size while maximizing spectral smoothness and brightness. One approach involves imploding a spherical shell, which generates a high-flux X-ray flash at stagnation. We present results from a series of experiments comparing the X-ray source properties produced by imploded empty and Ar-filled capsules.
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Affiliation(s)
- A Krygier
- Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA
| | - F Coppari
- Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA
| | - G E Kemp
- Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA
| | - D B Thorn
- Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA
| | - R S Craxton
- Laboratory for Laser Energetics, University of Rochester, 250 E. River Rd., Rochester, New York 14623-1299, USA
| | - J H Eggert
- Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA
| | - E M Garcia
- Laboratory for Laser Energetics, University of Rochester, 250 E. River Rd., Rochester, New York 14623-1299, USA
| | - J M McNaney
- Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA
| | - H-S Park
- Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA
| | - Y Ping
- Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA
| | - B A Remington
- Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA
| | - M B Schneider
- Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA
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9
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Coppari F, Thorn DB, Kemp GE, Craxton RS, Garcia EM, Ping Y, Eggert JH, Schneider MB. X-ray source development for EXAFS measurements on the National Ignition Facility. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2017; 88:083907. [PMID: 28863696 DOI: 10.1063/1.4999649] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Extended X-ray absorption Fine Structure (EXAFS) measurements require a bright, spectrally smooth, and broad-band x-ray source. In a laser facility, such an x-ray source can be generated by a laser-driven capsule implosion. In order to optimize the x-ray emission, different capsule types and laser irradiations have been tested at the National Ignition Facility (NIF). A crystal spectrometer is used to disperse the x-rays and high efficiency image plate detectors are used to measure the absorption spectra in transmission geometry. EXAFS measurements at the K-edge of iron at ambient conditions have been obtained for the first time on the NIF laser, and the requirements for optimization have been established.
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Affiliation(s)
- F Coppari
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D B Thorn
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - G E Kemp
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R S Craxton
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - E M Garcia
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - Y Ping
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J H Eggert
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M B Schneider
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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10
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Opachich YP, Heeter RF, Barrios MA, Garcia EM, Craxton RS, King JA, Liedahl DA, McKenty PW, Schneider MB, May MJ, Zhang R, Ross PW, Kline JL, Moore AS, Weaver JL, Flippo KA, Perry TS. Capsule implosions for continuum x-ray backlighting of opacity samples at the National Ignition Facility. PHYSICS OF PLASMAS 2017; 24:063301. [PMID: 29104422 PMCID: PMC5648568 DOI: 10.1063/1.4985076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 05/09/2017] [Indexed: 06/07/2023]
Abstract
Direct drive implosions of plastic capsules have been performed at the National Ignition Facility to provide a broad-spectrum (500-2000 eV) X-ray continuum source for X-ray transmission spectroscopy. The source was developed for the high-temperature plasma opacity experimental platform. Initial experiments using 2.0 mm diameter polyalpha-methyl styrene capsules with ∼20 μm thickness have been performed. X-ray yields of up to ∼1 kJ/sr have been measured using the Dante multichannel diode array. The backlighter source size was measured to be ∼100 μm FWHM, with ∼350 ps pulse duration during the peak emission stage. Results are used to simulate transmission spectra for a hypothetical iron opacity sample at 150 eV, enabling the derivation of photometrics requirements for future opacity experiments.
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Affiliation(s)
- Y P Opachich
- National Security Technologies, LLC, Livermore, California 94550, USA
| | - R F Heeter
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M A Barrios
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - E M Garcia
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
| | - R S Craxton
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
| | - J A King
- National Security Technologies, LLC, Livermore, California 94550, USA
| | - D A Liedahl
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - P W McKenty
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
| | - M B Schneider
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M J May
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R Zhang
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
| | - P W Ross
- National Security Technologies, LLC, Livermore, California 94550, USA
| | - J L Kline
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - A S Moore
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J L Weaver
- Naval Research Laboratory, Washington, D.C. 20375, USA
| | - K A Flippo
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - T S Perry
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
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Albert F, Lemos N, Shaw JL, Pollock BB, Goyon C, Schumaker W, Saunders AM, Marsh KA, Pak A, Ralph JE, Martins JL, Amorim LD, Falcone RW, Glenzer SH, Moody JD, Joshi C. Observation of Betatron X-Ray Radiation in a Self-Modulated Laser Wakefield Accelerator Driven with Picosecond Laser Pulses. PHYSICAL REVIEW LETTERS 2017; 118:134801. [PMID: 28409970 DOI: 10.1103/physrevlett.118.134801] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Indexed: 06/07/2023]
Abstract
We investigate a new regime for betatron x-ray emission that utilizes kilojoule-class picosecond lasers to drive wakes in plasmas. When such laser pulses with intensities of ∼5×10^{18} W/cm^{2} are focused into plasmas with electron densities of ∼1×10^{19} cm^{-3}, they undergo self-modulation and channeling, which accelerates electrons up to 200 MeV energies and causes those electrons to emit x rays. The measured x-ray spectra are fit with a synchrotron spectrum with a critical energy of 10-20 keV, and 2D particle-in-cell simulations were used to model the acceleration and radiation of the electrons in our experimental conditions.
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Affiliation(s)
- F Albert
- Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California 94550, USA
| | - N Lemos
- Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California 94550, USA
- Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA
| | - J L Shaw
- Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA
| | - B B Pollock
- Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California 94550, USA
| | - C Goyon
- Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California 94550, USA
| | - W Schumaker
- SLAC National Accelerator Laboratory, Stanford, California 94309, USA
| | - A M Saunders
- Lawrence Berkeley National Laboratory and University of California Berkeley, Berkeley, California 94720, USA
| | - K A Marsh
- Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA
| | - A Pak
- Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California 94550, USA
| | - J E Ralph
- Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California 94550, USA
| | - J L Martins
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - L D Amorim
- Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - R W Falcone
- Lawrence Berkeley National Laboratory and University of California Berkeley, Berkeley, California 94720, USA
| | - S H Glenzer
- SLAC National Accelerator Laboratory, Stanford, California 94309, USA
| | - J D Moody
- Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California 94550, USA
| | - C Joshi
- Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA
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Probing local and electronic structure in Warm Dense Matter: single pulse synchrotron x-ray absorption spectroscopy on shocked Fe. Sci Rep 2016; 6:26402. [PMID: 27246145 PMCID: PMC4887872 DOI: 10.1038/srep26402] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 04/28/2016] [Indexed: 12/02/2022] Open
Abstract
Understanding Warm Dense Matter (WDM), the state of planetary interiors, is a new frontier in scientific research. There exists very little experimental data probing WDM states at the atomic level to test current models and those performed up to now are limited in quality. Here, we report a proof-of-principle experiment that makes microscopic investigations of materials under dynamic compression easily accessible to users and with data quality close to that achievable at ambient. Using a single 100 ps synchrotron x-ray pulse, we have measured, by K-edge absorption spectroscopy, ns-lived equilibrium states of WDM Fe. Structural and electronic changes in Fe are clearly observed for the first time at such extreme conditions. The amplitude of the EXAFS oscillations persists up to 500 GPa and 17000 K, suggesting an enduring local order. Moreover, a discrepancy exists with respect to theoretical calculations in the value of the energy shift of the absorption onset and so this comparison should help to refine the approximations used in models.
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