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Title: Picosecond Thermodynamics in Underdense Plasmas Measured with Thomson Scattering

Abstract

The rapid evolution of electron density and temperature in a laser-produced plasma were measured using collective Thomson scattering. Unprecedented picosecond time resolution, enabled by a pulse-front-tilt compensated spectrometer, revealed a transition in the plasma-wave dynamics from an initially cold, collisional state to a quasi-stationary, collisionless state. The Thomson-scattering spectra were compared with theoretical calculations of the uctuation spectrum using either a conventional Bhatnagar Gross Krook (BGK) collision operator or the rigorous Landau collision terms: the BGK model overestimates the electron temperature by 50% in the most-collisional conditions.

Authors:
 [1];  [1];  [1];  [1];  [1];  [2];  [1]
  1. Univ. of Rochester, Rochester, NY (United States)
  2. Univ. of Alberta, Edmonton, AB (Canada); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
Univ. of Rochester, Rochester, NY (United States); Univ. of Rochester, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24); USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1508833
Alternate Identifier(s):
OSTI ID: 1498296
Report Number(s):
2018-254, 1493
Journal ID: ISSN 0031--9007
Grant/Contract Number:  
SC0016253; NA0003856; FWP100182
Resource Type:
Accepted Manuscript
Journal Name:
APS Physical Review Letters
Additional Journal Information:
Journal Volume: 122; Journal Issue: 15; Journal ID: ISSN 0031--9007
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Davies, A. S., Haberberger, D., Katz, J., Bucht, S., Palastro, J.P., Rozmus, W., and Froula, D. H.. Picosecond Thermodynamics in Underdense Plasmas Measured with Thomson Scattering. United States: N. p., 2019. Web. doi:10.1103/PhysRevLett.122.155001.
Davies, A. S., Haberberger, D., Katz, J., Bucht, S., Palastro, J.P., Rozmus, W., & Froula, D. H.. Picosecond Thermodynamics in Underdense Plasmas Measured with Thomson Scattering. United States. doi:10.1103/PhysRevLett.122.155001.
Davies, A. S., Haberberger, D., Katz, J., Bucht, S., Palastro, J.P., Rozmus, W., and Froula, D. H.. Thu . "Picosecond Thermodynamics in Underdense Plasmas Measured with Thomson Scattering". United States. doi:10.1103/PhysRevLett.122.155001.
@article{osti_1508833,
title = {Picosecond Thermodynamics in Underdense Plasmas Measured with Thomson Scattering},
author = {Davies, A. S. and Haberberger, D. and Katz, J. and Bucht, S. and Palastro, J.P. and Rozmus, W. and Froula, D. H.},
abstractNote = {The rapid evolution of electron density and temperature in a laser-produced plasma were measured using collective Thomson scattering. Unprecedented picosecond time resolution, enabled by a pulse-front-tilt compensated spectrometer, revealed a transition in the plasma-wave dynamics from an initially cold, collisional state to a quasi-stationary, collisionless state. The Thomson-scattering spectra were compared with theoretical calculations of the uctuation spectrum using either a conventional Bhatnagar Gross Krook (BGK) collision operator or the rigorous Landau collision terms: the BGK model overestimates the electron temperature by 50% in the most-collisional conditions.},
doi = {10.1103/PhysRevLett.122.155001},
journal = {APS Physical Review Letters},
number = 15,
volume = 122,
place = {United States},
year = {2019},
month = {2}
}

Journal Article:
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This content will become publicly available on April 1, 2020
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