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Title: Study of pure and mixed clustered noble gas puffs irradiated with a high intensity (7 × 10 19 W/cm 2) sub-ps laser beam and achievement of a strong X-ray flash in a laser-generated debris-free X-ray source

Abstract

We present a broad study of linear, clustered, noble gas puffs irradiated with the frequency doubled (527 nm) Titan laser at Lawrence Livermore National Laboratory. Pure Ar, Kr, and Xe clustered gas puffs, as well as two mixed-gas puffs consisting of KrAr and XeKrAr gases, make up the targets. Characterization experiments to determine gas-puff density show that varying the experimental parameter gas-delay timing (the delay between gas puff initialization and laser-gas-puff interaction) provides a simple control over the gas-puff density. X-ray emission (>1.4 keV) is studied as a function of gas composition, density, and delay timing. Xe gas puffs produce the strongest peak radiation in the several keV spectral region. The emitted radiation was found to be anisotropic, with smaller X-ray flux observed in the direction perpendicular to both laser beam propagation and polarization directions. The degree of anisotropy is independent of gas target type but increases with photon energy. X-ray spectroscopic measurements estimate plasma parameters and highlight their difference with previous studies. Electron beams with energy in excess of 72 keV are present in the noble gas-puff plasmas and results indicate that Ar plays a key role in their production. Finally, a drastic increase in harder X-ray emissions (X-raymore » flash effect) and multi-MeV electron-beam generation from Xe gas-puff plasma occurred when the laser beam was focused on the front edge of the linear gas puff.« less

Authors:
ORCiD logo [1];  [1];  [1];  [1]; ORCiD logo [1];  [1];  [1];  [2];  [1];  [1];  [3]; ORCiD logo [3];  [3]
  1. Univ. of Nevada, Reno, NV (United States)
  2. Naval Research Lab. (NRL), Washington, DC (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); US Air Force Office of Scientific Research (AFOSR)
OSTI Identifier:
1557744
Alternate Identifier(s):
OSTI ID: 1559924
Report Number(s):
LA-UR-18-20663; LLNL-JRNL-744010
Journal ID: ISSN 0263-0346; applab
Grant/Contract Number:  
89233218CNA000001; NA0003877; AC52-07NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Laser and Particle Beams
Additional Journal Information:
Journal Volume: 37; Journal Issue: 3; Journal ID: ISSN 0263-0346
Publisher:
Cambridge University Press
Country of Publication:
United States
Language:
English
Subject:
Lasers

Citation Formats

Schultz, K. A., Kantsyrev, V. L., Safronova, A. S., Shlyaptseva, V. V., Petkov, E. E., Shrestha, I. K., Cooper, M. C., Petrov, G. M., Stafford, A., Butcher, C. J., Kemp, G. E., Park, J., and Fournier, K. B. Study of pure and mixed clustered noble gas puffs irradiated with a high intensity (7 × 1019 W/cm2) sub-ps laser beam and achievement of a strong X-ray flash in a laser-generated debris-free X-ray source. United States: N. p., 2019. Web. doi:10.1017/S0263034619000521.
Schultz, K. A., Kantsyrev, V. L., Safronova, A. S., Shlyaptseva, V. V., Petkov, E. E., Shrestha, I. K., Cooper, M. C., Petrov, G. M., Stafford, A., Butcher, C. J., Kemp, G. E., Park, J., & Fournier, K. B. Study of pure and mixed clustered noble gas puffs irradiated with a high intensity (7 × 1019 W/cm2) sub-ps laser beam and achievement of a strong X-ray flash in a laser-generated debris-free X-ray source. United States. doi:10.1017/S0263034619000521.
Schultz, K. A., Kantsyrev, V. L., Safronova, A. S., Shlyaptseva, V. V., Petkov, E. E., Shrestha, I. K., Cooper, M. C., Petrov, G. M., Stafford, A., Butcher, C. J., Kemp, G. E., Park, J., and Fournier, K. B. Mon . "Study of pure and mixed clustered noble gas puffs irradiated with a high intensity (7 × 1019 W/cm2) sub-ps laser beam and achievement of a strong X-ray flash in a laser-generated debris-free X-ray source". United States. doi:10.1017/S0263034619000521.
@article{osti_1557744,
title = {Study of pure and mixed clustered noble gas puffs irradiated with a high intensity (7 × 1019 W/cm2) sub-ps laser beam and achievement of a strong X-ray flash in a laser-generated debris-free X-ray source},
author = {Schultz, K. A. and Kantsyrev, V. L. and Safronova, A. S. and Shlyaptseva, V. V. and Petkov, E. E. and Shrestha, I. K. and Cooper, M. C. and Petrov, G. M. and Stafford, A. and Butcher, C. J. and Kemp, G. E. and Park, J. and Fournier, K. B.},
abstractNote = {We present a broad study of linear, clustered, noble gas puffs irradiated with the frequency doubled (527 nm) Titan laser at Lawrence Livermore National Laboratory. Pure Ar, Kr, and Xe clustered gas puffs, as well as two mixed-gas puffs consisting of KrAr and XeKrAr gases, make up the targets. Characterization experiments to determine gas-puff density show that varying the experimental parameter gas-delay timing (the delay between gas puff initialization and laser-gas-puff interaction) provides a simple control over the gas-puff density. X-ray emission (>1.4 keV) is studied as a function of gas composition, density, and delay timing. Xe gas puffs produce the strongest peak radiation in the several keV spectral region. The emitted radiation was found to be anisotropic, with smaller X-ray flux observed in the direction perpendicular to both laser beam propagation and polarization directions. The degree of anisotropy is independent of gas target type but increases with photon energy. X-ray spectroscopic measurements estimate plasma parameters and highlight their difference with previous studies. Electron beams with energy in excess of 72 keV are present in the noble gas-puff plasmas and results indicate that Ar plays a key role in their production. Finally, a drastic increase in harder X-ray emissions (X-ray flash effect) and multi-MeV electron-beam generation from Xe gas-puff plasma occurred when the laser beam was focused on the front edge of the linear gas puff.},
doi = {10.1017/S0263034619000521},
journal = {Laser and Particle Beams},
issn = {0263-0346},
number = 3,
volume = 37,
place = {United States},
year = {2019},
month = {7}
}

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