Thresholds of absolute two-plasmon-decay and stimulated Raman scattering instabilities driven by multiple broadband lasers

被引：34

作者：

Follett, R. K. ^{[1
]}

Shaw, J. G. ^{[1
]}

Myatt, J. F. ^{[2
]}

Wen, H. ^{[1
]}

Froula, D. H. ^{[1
]}

Palastro, J. P. ^{[1
]}

机构：

[1] Univ Rochester, Lab Laser Energet, 250 East River Rd, Rochester, NY 14623 USA

[2] Univ Alberta, Dept Elect & Comp Engn, 9211 116th St NW, Edmonton, AB T6G 1H9, Canada

来源：

PHYSICS OF PLASMAS | 2021年 / 28卷 / 03期

关键词：

INDUCED SPATIAL INCOHERENCE; FINITE-BANDWIDTH DRIVER; PARAMETRIC-INSTABILITIES; HOT-SPOTS; PLASMA; BEAMS; DECAY; COMPRESSION; UNIFORMITY; TURBULENCE;

D O I：

10.1063/5.0037869

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Thresholds for the absolute stimulated Raman scattering (SRS) and two-plasma decay (TPD) instabilities driven by multiple broadband laser beams are evaluated using 3D simulations at conditions relevant to inertial confinement fusion experiments. Multibeam TPD and SRS backscatter are found to be easier to mitigate with bandwidth than the corresponding single-beam instabilities. A relative bandwidth of 1% increases the threshold for absolute SRS backscatter by a factor of 4 at conditions relevant to ongoing National Ignition Facility experiments and should be sufficient to keep all of the absolute instabilities below threshold in experiments with similar conditions.

引用

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页数：10

共 48 条

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