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Title: Multibeam Stimulated Raman Scattering in Inertial Confinement Fusion Conditions

Abstract

Stimulated Raman scattering (SRS) from multiple laser beams arranged in a cone sharing a common daughter wave is investigated for inertial confinement fusion (ICF) conditions in a inhomogeneous plasma. It is found that the shared-electron plasma wave (EPW) process, where the lasers collectively drive the same EPW, can lead to an absolute instability when the electron density reaches a matching condition dependent on the cone angle of the laser beams. This mechanism could explain recent experimental observations of hot electrons at early times in ICF experiments, at densities well below quarter-critical when two plasmon decay is not expected to occur.

Authors:
 [1];  [1];  [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1234581
Alternate Identifier(s):
OSTI ID: 1206802
Report Number(s):
LLNL-JRNL-667772
Journal ID: ISSN 0031-9007; PRLTAO
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 115; Journal Issue: 5; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; 42 ENGINEERING

Citation Formats

Michel, P., Divol, L., Dewald, E. L., Milovich, J. L., Hohenberger, M., Jones, O. S., Hopkins, L. Berzak, Berger, R. L., Kruer, W. L., and Moody, J. D. Multibeam Stimulated Raman Scattering in Inertial Confinement Fusion Conditions. United States: N. p., 2015. Web. doi:10.1103/PhysRevLett.115.055003.
Michel, P., Divol, L., Dewald, E. L., Milovich, J. L., Hohenberger, M., Jones, O. S., Hopkins, L. Berzak, Berger, R. L., Kruer, W. L., & Moody, J. D. Multibeam Stimulated Raman Scattering in Inertial Confinement Fusion Conditions. United States. https://doi.org/10.1103/PhysRevLett.115.055003
Michel, P., Divol, L., Dewald, E. L., Milovich, J. L., Hohenberger, M., Jones, O. S., Hopkins, L. Berzak, Berger, R. L., Kruer, W. L., and Moody, J. D. 2015. "Multibeam Stimulated Raman Scattering in Inertial Confinement Fusion Conditions". United States. https://doi.org/10.1103/PhysRevLett.115.055003. https://www.osti.gov/servlets/purl/1234581.
@article{osti_1234581,
title = {Multibeam Stimulated Raman Scattering in Inertial Confinement Fusion Conditions},
author = {Michel, P. and Divol, L. and Dewald, E. L. and Milovich, J. L. and Hohenberger, M. and Jones, O. S. and Hopkins, L. Berzak and Berger, R. L. and Kruer, W. L. and Moody, J. D.},
abstractNote = {Stimulated Raman scattering (SRS) from multiple laser beams arranged in a cone sharing a common daughter wave is investigated for inertial confinement fusion (ICF) conditions in a inhomogeneous plasma. It is found that the shared-electron plasma wave (EPW) process, where the lasers collectively drive the same EPW, can lead to an absolute instability when the electron density reaches a matching condition dependent on the cone angle of the laser beams. This mechanism could explain recent experimental observations of hot electrons at early times in ICF experiments, at densities well below quarter-critical when two plasmon decay is not expected to occur.},
doi = {10.1103/PhysRevLett.115.055003},
url = {https://www.osti.gov/biblio/1234581}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 5,
volume = 115,
place = {United States},
year = {Thu Jul 30 00:00:00 EDT 2015},
month = {Thu Jul 30 00:00:00 EDT 2015}
}

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Cited by: 49 works
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Works referenced in this record:

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