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Huang K, Li MH, Yan WC, Guo X, Li DZ, Chen YP, Ma Y, Zhao JR, Li YF, Zhang J, Chen LM. Intense high repetition rate Mo Kα x-ray source generated from laser solid interaction for imaging application. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2014; 85:113304. [PMID: 25430107 DOI: 10.1063/1.4901519] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We report an efficient Mo Kα x-ray source produced by interaction of femtosecond Ti: sapphire laser pulses with a solid Molybdenum target working at 1 kHz repetition rate. The generated Mo Kα x-ray intensity reaches to 4.7 × 10(10) photons sr(-1) s(-1), corresponding to an average power of 0.8 mW into 2π solid angle. The spatial resolution of this x-ray source is measured to be 26 lp/mm. With the high flux and high spatial resolution characteristics, high resolving in-line x-ray radiography was realized on test objects and large size biological samples within merely half a minute. This experiment shows the possibility of laser plasma hard x-ray source as a new low cost and high resolution system for radiography and its ability of ultrafast x-ray pump-probe study of matter.
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Affiliation(s)
- K Huang
- Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190, China
| | - M H Li
- Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190, China
| | - W C Yan
- Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190, China
| | - X Guo
- Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190, China
| | - D Z Li
- Institute of High Energy Physics, CAS, Beijing 100049, China
| | - Y P Chen
- Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Y Ma
- Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190, China
| | - J R Zhao
- Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190, China
| | - Y F Li
- Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190, China
| | - J Zhang
- Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China
| | - L M Chen
- Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190, China
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Hasegawa S, Takashima R, Todoriki M, Kikkawa S, Soda K, Takano K, Oishi Y, Nayuki T, Fujii T, Nemoto K. Determination of the temperature of bremsstrahlung photon generated by ultraintense laser using various thickness attenuators. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2011; 82:033301. [PMID: 21456726 DOI: 10.1063/1.3553496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We evaluate the simplified method using the Lambert-Beer law to measure the temperature of bremsstrahlung photon generated by an ultraintense laser. Analytical values are compared to the results of the Monte Carlo calculation of GEANT4 and they agreed very well on the condition of the appropriate distance between the attenuator and the detector. We performed the experiment to measure the temperature of bremsstrahlung x-ray emitted from a metal target irradiated by a Ti:sapphire laser with 76 mJ, 72 fs, 2.2 × 10(18) W∕cm(2). For a Cu target of 30 μm thick, the photon temperature was reasonably determined to be 0.18 MeV, which is in good agreement with previous studies.
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Affiliation(s)
- Shuichi Hasegawa
- Department of Systems Innovation, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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Chen LM, Liu F, Wang WM, Kando M, Mao JY, Zhang L, Ma JL, Li YT, Bulanov SV, Tajima T, Kato Y, Sheng ZM, Wei ZY, Zhang J. Intense high-contrast femtosecond K-shell x-ray source from laser-driven Ar clusters. PHYSICAL REVIEW LETTERS 2010; 104:215004. [PMID: 20867110 DOI: 10.1103/physrevlett.104.215004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2010] [Indexed: 05/29/2023]
Abstract
Bright Ar quasimonochromatic K-shell x ray with very little background has been generated using an Ar clustering gas jet target irradiated with a 30 fs ultrahigh-contrast laser, with a measured flux of 2.2×10(11) photons/J into 4π. This intense x-ray source critically depends on the laser contrast and intensity. The optimization of source output with interaction length is addressed. Simulations point to a nonlinear resonant mechanism of electron heating during the early stage of laser interaction, resulting in enhanced x-ray emission. The x-ray pulse duration is expected to be only 10 fs, opening the possibility for single-shot ultrafast keV x-ray imaging applications.
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Affiliation(s)
- L M Chen
- Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100080, China.
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Chen LM, Kando M, Xu MH, Li YT, Koga J, Chen M, Xu H, Yuan XH, Dong QL, Sheng ZM, Bulanov SV, Kato Y, Zhang J, Tajima T. Study of x-ray emission enhancement via a high-contrast femtosecond laser interacting with a solid foil. PHYSICAL REVIEW LETTERS 2008; 100:045004. [PMID: 18352290 DOI: 10.1103/physrevlett.100.045004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2006] [Indexed: 05/26/2023]
Abstract
We observed the increase of the conversion efficiency from laser energy to Kalpha x-ray energy (eta(K)) produced by a 60 fs frequency doubled high-contrast laser pulse focused on a Cu foil, compared to the case of the fundamental laser pulse. eta(K) shows a strong dependence on the nonlinearly modified rising edge of the laser pulse. It reaches a maximum for a 100 fs negatively modified pulse. The hot electron efficient heating leads to the enhancement of eta(K). This demonstrates that high-contrast lasers are an effective tool for optimizing eta(K), via increasing the hot electrons by vacuum heating.
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Affiliation(s)
- L M Chen
- Advanced Photon Research Center, Kansai Photon Science Institute, JAEA, Kyoto 619-0215, Japan
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5
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Tarasevitch A, Dietrich C, Blome C, Sokolowski-Tinten K, von der Linde D. 3/2 harmonic generation by femtosecond laser pulses in steep-gradient plasmas. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2003; 68:026410. [PMID: 14525123 DOI: 10.1103/physreve.68.026410] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2002] [Revised: 05/12/2003] [Indexed: 11/07/2022]
Abstract
The onset of an electron parametric instability and 3/2 harmonic generation in variable-scale-length plasmas on solid surfaces using femtosecond pulses is observed. With the intensity approaching 10(18) W/cm(2), the instability threshold is already reached at plasma scale lengths of the order of the laser wavelength. A well-collimated harmonic emission with unusually broad spectrum is obtained.
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Affiliation(s)
- A Tarasevitch
- Institut für Laser-und Plasmaphysik, Universität Essen-Duisburg, D-45117 Essen, Germany.
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Hilscher D, Berndt O, Enke M, Jahnke U, Nickles PV, Ruhl H, Sandner W. Neutron energy spectra from the laser-induced Dd,n3He reaction. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2001; 64:016414. [PMID: 11461417 DOI: 10.1103/physreve.64.016414] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2000] [Revised: 01/11/2001] [Indexed: 05/23/2023]
Abstract
Detailed neutron energy spectra were measured for the D(d,n)3He reaction induced in solid (CD2)(n) targets by irradiation with 50-fs 2 x 10(18) W/cm(2) light pulses from a 10-TW Ti:Sapphire laser. The neutrons were observed at two angles 5 degrees and 112 degrees relative to the incident laser beam. The neutron spectra at the two angles are characterized by peaks with large widths of about 700 keV full width at half maximum and a shift of 300 keV between them. Neutron energies of up to about 4 MeV were observed indicating that deuterons are accelerated up to an energy of 1 MeV in the laser produced plasma. Simulation calculations can describe qualitatively the neutron spectra by assuming isotropic deuteron acceleration and a reduction of the reaction probability by a factor of 1/3 for deuterons emitted from the front of the target. These calculations indicate in particular that it is necessary to assume deuterons moving both into and out of the front of the target in order to describe the neutron energy spectra at the two angles. The highest recorded mean neutron yield was about 10(4) neutrons per pulse. The neutron yield increases with the number of electrons emitted from the front of the target and with the intensity of the prompt gamma flash induced by the bremsstrahlung of energetic electrons.
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Affiliation(s)
- D Hilscher
- Hahn-Meitner-Institut Berlin, Glienickerstrasse 100, D-14109 Berlin, Germany.
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Posp�?il J, Nov�k R, Sopko B, Sp?v�?ek V, Hl�dek P, Mat?jka P, Mackov� A, Cejnarov� A, Juha L, Kr�sa J. Thermoluminescence of CVD Diamond Films Used in Photon Dosimetry. ACTA ACUST UNITED AC 2001. [DOI: 10.1002/1521-396x(200105)185:1<195::aid-pssa195>3.0.co;2-b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Schwoerer H, Gibbon P, Düsterer S, Behrens R, Ziener C, Reich C, Sauerbrey R. Mev X rays and photoneutrons from femtosecond laser-produced plasmas. PHYSICAL REVIEW LETTERS 2001; 86:2317-2320. [PMID: 11289918 DOI: 10.1103/physrevlett.86.2317] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2000] [Indexed: 05/23/2023]
Abstract
We demonstrate a novel method to monitor the total angular distribution of the spectrum of hard x-ray emission from a plasma generated with femtosecond laser pulses with an intensity of 5 x 10(18) W/cm2 on a solid target. Measured and calculated angular distributions of x rays show a pronounced anisotropy for MeV photon energies. We complemented the spectral information by demonstrating a (gamma,n) nuclear reaction with a tabletop laser system.
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Affiliation(s)
- H Schwoerer
- Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, Jena, Germany
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