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Title: Pump depletion and hot-electron generation in long-density-scale-length plasma with shock-ignition high-intensity laser

Abstract

Two-dimensional particle-in-cell simulations for laser plasma interaction with laser intensity of 1016 W/cm2, plasma density range of 0.01–0.28$$n_c$$, and scale length of 230–330 $$\textit{μ}$$m showed significant pump depletion of the laser energy due to stimulated Raman scattering (SRS) and stimulated Brillouin scattering (SBS) in the low-density region ($$n_e$$ = 0.01–0.2$$n_c$$). The simulations identified hot electrons generated by SRS in the low-density region with moderate energy and by two-plasmon-decay near $$n_e$$ = 0.25$$n_c$$ with higher energy. The overall hot electron temperature (46 keV) and conversion efficiency (3%) were consistent with the experiment's measurements. Further, the simulations also showed artificially reducing SBS would lead to stronger SRS and a softer hot-electron spectrum.

Authors:
 [1]; ORCiD logo [1];  [2];  [3]; ORCiD logo [1];  [4]; ORCiD logo [2]
+ Show Author Affiliations
  1. Univ. of California San Diego, La Jolla, CA (United States)
  2. General Atomics, San Diego, CA (United States)
  3. Univ. of California, Los Angeles, CA (United States)
  4. Univ. of Rochester, NY (United States)
Publication Date:
Research Org.:
General Atomics, San Diego, CA (United States); Univ. of Rochester, NY (United States); Univ. of California, Oakland, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Argonne National Lab. (ANL), Argonne, IL (United States). Argonne Leadership Computing Facility (ALCF)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1801132
Alternate Identifier(s):
OSTI ID: 1605463
Grant/Contract Number:  
NA0002730; NA0003600; SC0012316; SC0014666; AC02-05CH11231; AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review E
Additional Journal Information:
Journal Volume: 101; Journal Issue: 3; Journal ID: ISSN 2470-0045
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Physics

Citation Formats

Li, J., Zhang, S., Krauland, C. M., Wen, H., Beg, F. N., Ren, C., and Wei, M. S. Pump depletion and hot-electron generation in long-density-scale-length plasma with shock-ignition high-intensity laser. United States: N. p., 2020. Web. doi:10.1103/physreve.101.033206.
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Li, J., Zhang, S., Krauland, C. M., Wen, H., Beg, F. N., Ren, C., & Wei, M. S. Pump depletion and hot-electron generation in long-density-scale-length plasma with shock-ignition high-intensity laser. United States. https://doi.org/10.1103/physreve.101.033206
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Li, J., Zhang, S., Krauland, C. M., Wen, H., Beg, F. N., Ren, C., and Wei, M. S. Wed . "Pump depletion and hot-electron generation in long-density-scale-length plasma with shock-ignition high-intensity laser". United States. https://doi.org/10.1103/physreve.101.033206. https://www.osti.gov/servlets/purl/1801132.
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@article{osti_1801132,
title = {Pump depletion and hot-electron generation in long-density-scale-length plasma with shock-ignition high-intensity laser},
author = {Li, J. and Zhang, S. and Krauland, C. M. and Wen, H. and Beg, F. N. and Ren, C. and Wei, M. S.},
abstractNote = {Two-dimensional particle-in-cell simulations for laser plasma interaction with laser intensity of 1016 W/cm2, plasma density range of 0.01–0.28$n_c$, and scale length of 230–330 $\textit{μ}$m showed significant pump depletion of the laser energy due to stimulated Raman scattering (SRS) and stimulated Brillouin scattering (SBS) in the low-density region ($n_e$ = 0.01–0.2$n_c$). The simulations identified hot electrons generated by SRS in the low-density region with moderate energy and by two-plasmon-decay near $n_e$ = 0.25$n_c$ with higher energy. The overall hot electron temperature (46 keV) and conversion efficiency (3%) were consistent with the experiment's measurements. Further, the simulations also showed artificially reducing SBS would lead to stronger SRS and a softer hot-electron spectrum.},
doi = {10.1103/physreve.101.033206},
journal = {Physical Review E},
number = 3,
volume = 101,
place = {United States},
year = {Wed Mar 18 00:00:00 EDT 2020},
month = {Wed Mar 18 00:00:00 EDT 2020}
}
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https://doi.org/10.1103/physreve.101.033206
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