Multibeam absolute stimulated Raman scattering and two-plasmon decay
Abstract
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.
- Authors:
-
[1];
- Univ. of Rochester, NY (United States). Lab. for Laser Energetics
- Univ. of Alberta, Edmonton, AB (Canada)
- Publication Date:
- Research Org.:
- Univ. of Rochester, NY (United States). Lab. for Laser Energetics
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1618440
- Report Number(s):
- 2019-329, 1562, 2518
Journal ID: ISSN 2470-0045; PLEEE8; 2019-329, 1562, 2518; TRN: US2106819
- Grant/Contract Number:
- NA0003856
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review E
- Additional Journal Information:
- Journal Volume: 101; Journal Issue: 4; Journal ID: ISSN 2470-0045
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Follett, R. K., Shaw, J. G., Myatt, J. F., Froula, D. H., and Palastro, J. P. Multibeam absolute stimulated Raman scattering and two-plasmon decay. United States: N. p., 2020.
Web. doi:10.1103/PhysRevE.101.043214.
Follett, R. K., Shaw, J. G., Myatt, J. F., Froula, D. H., & Palastro, J. P. Multibeam absolute stimulated Raman scattering and two-plasmon decay. United States. https://doi.org/10.1103/PhysRevE.101.043214
Follett, R. K., Shaw, J. G., Myatt, J. F., Froula, D. H., and Palastro, J. P. Wed .
"Multibeam absolute stimulated Raman scattering and two-plasmon decay". United States. https://doi.org/10.1103/PhysRevE.101.043214. https://www.osti.gov/servlets/purl/1618440.
@article{osti_1618440,
title = {Multibeam absolute stimulated Raman scattering and two-plasmon decay},
author = {Follett, R. K. and Shaw, J. G. and Myatt, J. F. and Froula, D. H. and Palastro, J. P.},
abstractNote = {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.},
doi = {10.1103/PhysRevE.101.043214},
journal = {Physical Review E},
number = 4,
volume = 101,
place = {United States},
year = {Wed Apr 29 00:00:00 EDT 2020},
month = {Wed Apr 29 00:00:00 EDT 2020}
}
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