Multibeam absolute stimulated Raman scattering and two-plasmon decay

Follett, R. K.; Shaw, J. G.; Myatt, J. F.; Froula, D. H.; Palastro, J. P.

doi:10.1103/PhysRevE.101.043214

Title: Multibeam absolute stimulated Raman scattering and two-plasmon decay

Journal Article · Wed Apr 29 00:00:00 EDT 2020 · Physical Review E

DOI:https://doi.org/10.1103/PhysRevE.101.043214· OSTI ID:1618440

^[1]; Shaw, J. G. ^[1]; Myatt, J. F. ^[2]; Froula, D. H. ^[1]; Palastro, J. P. ^[1]

Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Univ. of Alberta, Edmonton, AB (Canada)

Multibeam absolute instability thresholds for stimulated Raman scattering (SRS) and two-plasmon decay (TPD) are calculated in three dimensions for conditions relevant to direct-drive inertial confinement fusion experiments on the OMEGA laser and at the National Ignition Facility (NIF). Although multibeam effects are found to be significant for both instabilities, SRS is found to have less efficient multibeam coupling than TPD. The results are consistent with the observation of a TPD-dominated regime on the OMEGA laser and a SRS-dominated regime on the NIF despite the single-beam SRS threshold being lower than the single-beam TPD threshold on both facilities. The minimum instability threshold for NIF plasma parameters occurs for SRS near quarter-critical densities with a shared electromagnetic wave propagating along the beam axis.

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Research Organization:: Univ. of Rochester, NY (United States). Lab. for Laser Energetics

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

Grant/Contract Number:: NA0003856

OSTI ID:: 1618440

Report Number(s):: 2019-329, 1562, 2518; PLEEE8; 2019-329, 1562, 2518; TRN: US2106819

Journal Information:: Physical Review E, Vol. 101, Issue 4; ISSN 2470-0045

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 5 works

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References (21)

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