Evolution of the Electron Distribution Function in the Presence of Inverse Bremsstrahlung Heating and Collisional Ionization

Milder, A. L.; Le, H. P.; Sherlock, M.; Franke, P.; Katz, J.; Ivancic, S. T.; Shaw, J. L.; Palastro, J. P.; Hansen, A. M.; Begishev, I. A.; Rozmus, W.; Froula, D. H.

doi:10.1103/PhysRevLett.124.025001

Title: Evolution of the Electron Distribution Function in the Presence of Inverse Bremsstrahlung Heating and Collisional Ionization

Journal Article · 13 January 2020 · Physical Review Letters

DOI: https://doi.org/10.1103/PhysRevLett.124.025001 · OSTI ID:1599351

Milder, A. L. ^[1];

^[2]; Sherlock, M. ^[2]; Franke, P. ^[3]; Katz, J. ^[4]; Ivancic, S. T. ^[4]; Shaw, J. L. ^[4]; Palastro, J. P. ^[4]; Hansen, A. M. ^[3]; Begishev, I. A. ^[4]; Rozmus, W. ^[5]; Froula, D. H. ^[3]

Univ. of Rochester, NY (United States). Lab. for Laser Energetics; Univ. of Rochester, NY (United States). Dept. of Physics and Astronomy; Laboratory for Laser Energetics, University of Rochester
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. of Rochester, NY (United States). Lab. for Laser Energetics; Univ. of Rochester, NY (United States). Dept. of Physics and Astronomy
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Univ. of Alberta, Edmonton, AB (Canada)

The picosecond evolution of non-Maxwellian electron distribution functions was measured here in a laser-produced plasma using collective electron plasma wave Thomson scattering. During the laser heating, the distribution was measured to be approximately super-Gaussian due to inverse bremsstrahlung heating. After the heating laser turned off, collisional ionization caused further modification to the distribution function while increasing electron density and decreasing temperature. Electron distribution functions were observed using Vlasov-Fokker-Planck simulations including atomic kinetics.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Univ. of Rochester, NY (United States). Lab. for Laser Energetics

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344; NA0003856

OSTI ID:: 1599351

Report Number(s):: 2019--70, 1545; LLNL-JRNL--788470; 2019-70, 1545, 2502

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 2 Vol. 124; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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