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Title: Laser reflection as a catalyst for direct laser acceleration in multipicosecond laser-plasma interaction

Abstract

We demonstrate in this work that laser reflection acts as a catalyst for superponderomotive electron production in the preplasma formed by relativistic multipicosecond lasers incident on solid density targets. In 1D particle-in-cell simulations, high energy electron production proceeds via two stages of direct laser acceleration, an initial stochastic backward stage, and a final non-stochastic forward stage. The initial stochastic stage, driven by the reflected laser pulse, provides the pre-acceleration needed to enable the final stage to be non-stochastic. Energy gain in the electrostatic potential, which has been frequently considered to enhance stochastic heating, is only of secondary importance. The mechanism underlying the production of high energy electrons by laser pulses incident on solid density targets is of direct relevance to applications involving multipicosecond laser-plasma interactions.

Authors:
ORCiD logo [1];  [2];  [1]; ORCiD logo [1]
  1. Univ. of California, San Diego, CA (United States). Dept. of Mechanical and Aerospace Engineering
  2. Rutherford-Appleton Lab. (United Kingdom). Central Laser Facility
Publication Date:
Research Org.:
Univ. of California, San Diego, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24); Engineering and Physical Sciences Research Council (EPSRC); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division
OSTI Identifier:
1594723
Alternate Identifier(s):
OSTI ID: 1582496
Grant/Contract Number:  
SC0018312; FG02-97ER25308; EP/G054940; EP/G055165; EP/G056803; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 27; Journal Issue: 1; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Electromagnetism; Stochastic processes; Particle-in-cell method; Wave mechanics; Laser plasma interactions

Citation Formats

Weichman, K., Robinson, A. P. L., Beg, F. N., and Arefiev, A. V. Laser reflection as a catalyst for direct laser acceleration in multipicosecond laser-plasma interaction. United States: N. p., 2020. Web. doi:10.1063/1.5129054.
Weichman, K., Robinson, A. P. L., Beg, F. N., & Arefiev, A. V. Laser reflection as a catalyst for direct laser acceleration in multipicosecond laser-plasma interaction. United States. doi:10.1063/1.5129054.
Weichman, K., Robinson, A. P. L., Beg, F. N., and Arefiev, A. V. Mon . "Laser reflection as a catalyst for direct laser acceleration in multipicosecond laser-plasma interaction". United States. doi:10.1063/1.5129054.
@article{osti_1594723,
title = {Laser reflection as a catalyst for direct laser acceleration in multipicosecond laser-plasma interaction},
author = {Weichman, K. and Robinson, A. P. L. and Beg, F. N. and Arefiev, A. V.},
abstractNote = {We demonstrate in this work that laser reflection acts as a catalyst for superponderomotive electron production in the preplasma formed by relativistic multipicosecond lasers incident on solid density targets. In 1D particle-in-cell simulations, high energy electron production proceeds via two stages of direct laser acceleration, an initial stochastic backward stage, and a final non-stochastic forward stage. The initial stochastic stage, driven by the reflected laser pulse, provides the pre-acceleration needed to enable the final stage to be non-stochastic. Energy gain in the electrostatic potential, which has been frequently considered to enhance stochastic heating, is only of secondary importance. The mechanism underlying the production of high energy electrons by laser pulses incident on solid density targets is of direct relevance to applications involving multipicosecond laser-plasma interactions.},
doi = {10.1063/1.5129054},
journal = {Physics of Plasmas},
number = 1,
volume = 27,
place = {United States},
year = {2020},
month = {1}
}

Journal Article:
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