Multibeam Stimulated Raman Scattering in Inertial Confinement Fusion Conditions

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.

doi:10.1103/PhysRevLett.115.055003

Title: Multibeam Stimulated Raman Scattering in Inertial Confinement Fusion Conditions

Journal Article · Thu Jul 30 00:00:00 EDT 2015 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.115.055003· OSTI ID:1234581

Michel, P. ^[1]; Divol, L. ^[1]; Dewald, E. L. ^[1]; Milovich, J. L. ^[1]; Hohenberger, M. ^[2]; Jones, O. S. ^[1]; Hopkins, L. Berzak ^[1]; Berger, R. L. ^[1]; Kruer, W. L. ^[1]; Moody, J. D. ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. of Rochester, NY (United States). Lab. for Laser Energetics

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.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1234581

Alternate ID(s):: OSTI ID: 1206802

Report Number(s):: LLNL-JRNL-667772; PRLTAO

Journal Information:: Physical Review Letters, Vol. 115, Issue 5; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 49 works

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Laser-direct-drive program: Promise, challenge, and path forward Campbell, E. M.; Goncharov, V. N.; Sangster, T. C. Matter and Radiation at Extremes, Vol. 2, Issue 2 https://doi.org/10.1016/j.mre.2017.03.001	journal	March 2017
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Two decades of progress in understanding and control of laser plasma instabilities in indirect drive inertial fusion Montgomery, David S. Physics of Plasmas, Vol. 23, Issue 5 https://doi.org/10.1063/1.4946016	journal	April 2016
Reducing parametric backscattering by polarization rotation Barth, Ido; Fisch, Nathaniel J. Physics of Plasmas, Vol. 23, Issue 10 https://doi.org/10.1063/1.4964291	journal	October 2016
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Recent research progress of laser plasma interactions in Shenguang laser facilities Gong, Tao; Hao, Liang; Li, Zhichao Matter and Radiation at Extremes, Vol. 4, Issue 5 https://doi.org/10.1063/1.5092446	journal	September 2019
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A unified modeling of wave mixing processes with the ray tracing method Debayle, A.; Ruyer, C.; Morice, O. Physics of Plasmas, Vol. 26, Issue 9 https://doi.org/10.1063/1.5110247	journal	September 2019
On the stimulated Raman sidescattering in inhomogeneous plasmas: revisit of linear theory and three-dimensional particle-in-cell simulations Xiao, C. Z.; Zhuo, H. B.; Yin, Y. Plasma Physics and Controlled Fusion, Vol. 60, Issue 2 https://doi.org/10.1088/1361-6587/aa9b41	journal	January 2018
Stimulated Raman sidescattering in intense laser produced plasmas with steep density gradients Liang, Zhenfeng; Shen, Baifei Plasma Physics and Controlled Fusion, Vol. 61, Issue 7 https://doi.org/10.1088/1361-6587/ab1d0e	journal	May 2019
Experimental demonstration of low laser-plasma instabilities in gas-filled spherical hohlraums at laser injection angle designed for ignition target Lan, Ke; Li, Zhichao; Xie, Xufei Physical Review E, Vol. 95, Issue 3 https://doi.org/10.1103/physreve.95.031202	journal	March 2017

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