Measurements of Non-Maxwellian Electron Distribution Functions and Their Effect on Laser Heating
Abstract
Electron velocity distribution functions driven by inverse bremsstrahlung heating were measured to be non-Maxwellian using a novel angularly resolved Thomson-scattering instrument and the corresponding reduction of electrons at slow velocities resulted in a ~40% measured reduction in inverse bremsstrahlung absorption. The distribution functions were measured to be super-Gaussian in the bulk (v=vth < 3) and Maxwellian in the tail (v=vth > 3) when the laser heating rate dominated over the electron-electron thermalization rate. Simulations with the particle code Quartz showed the shape of the tail was dictated by the uniformity of the laser heating.
- Authors:
-
[5]
- Univ. of Rochester, NY (United States); Lab. for Laser Energetics, Rochester, NY (United States)
- Lab. for Laser Energetics, Rochester, NY (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Univ. of Alberta, Edmonton, AB (Canada)
- Lab. for Laser Energetics, Rochester, NY (United States); Univ. of Rochester, NY (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of Rochester, NY (United States). Lab. for Laser Energetics
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1827514
- Alternate Identifier(s):
- OSTI ID: 1829730
- Report Number(s):
- LLNL-JRNL-815359
Journal ID: ISSN 0031-9007; 1023301; TRN: US2215960
- Grant/Contract Number:
- AC52-07NA27344; NA0003856
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 127; Journal Issue: 1; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Laser-plasma interactions; Plasma production & heating by laser beams; laser-foil; laser-cluster; Light scattering; Optical plasma measurements
Citation Formats
Milder, A. L., Katz, J., Boni, R., Palastro, J. P., Sherlock, M., Rozmus, W., and Froula, D. H. Measurements of Non-Maxwellian Electron Distribution Functions and Their Effect on Laser Heating. United States: N. p., 2021.
Web. doi:10.1103/physrevlett.127.015001.
Milder, A. L., Katz, J., Boni, R., Palastro, J. P., Sherlock, M., Rozmus, W., & Froula, D. H. Measurements of Non-Maxwellian Electron Distribution Functions and Their Effect on Laser Heating. United States. https://doi.org/10.1103/physrevlett.127.015001
Milder, A. L., Katz, J., Boni, R., Palastro, J. P., Sherlock, M., Rozmus, W., and Froula, D. H. Tue .
"Measurements of Non-Maxwellian Electron Distribution Functions and Their Effect on Laser Heating". United States. https://doi.org/10.1103/physrevlett.127.015001. https://www.osti.gov/servlets/purl/1827514.
@article{osti_1827514,
title = {Measurements of Non-Maxwellian Electron Distribution Functions and Their Effect on Laser Heating},
author = {Milder, A. L. and Katz, J. and Boni, R. and Palastro, J. P. and Sherlock, M. and Rozmus, W. and Froula, D. H.},
abstractNote = {Electron velocity distribution functions driven by inverse bremsstrahlung heating were measured to be non-Maxwellian using a novel angularly resolved Thomson-scattering instrument and the corresponding reduction of electrons at slow velocities resulted in a ~40% measured reduction in inverse bremsstrahlung absorption. The distribution functions were measured to be super-Gaussian in the bulk (v=vth < 3) and Maxwellian in the tail (v=vth > 3) when the laser heating rate dominated over the electron-electron thermalization rate. Simulations with the particle code Quartz showed the shape of the tail was dictated by the uniformity of the laser heating.},
doi = {10.1103/physrevlett.127.015001},
journal = {Physical Review Letters},
number = 1,
volume = 127,
place = {United States},
year = {Tue Jun 29 00:00:00 EDT 2021},
month = {Tue Jun 29 00:00:00 EDT 2021}
}
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