Stimulated Brillouin backscatter in the presence of transverse plasma flow

Journal Article · Mon Feb 01 04:00:00 EST 1999 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.873202· OSTI ID:295522

Hinkel, D E; Berger, R L; Williams, E A; Langdon, A B; Still, C H; Lasinski, B F ^[1]

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1. Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550 (United States)

Three-dimensional simulations show that stimulated Brillouin backscattered (SBS) light can be deflected in a direction opposite to transverse plasma flow. When the backscatter gain occurs predominantly in the region beyond where the incident light is deflected by transverse flow, and when the backscatter gain from the deflected incident light region is detuned from the undeflected incident light region by axial flow gradients, the SBS deflection correlates well with the steering of the incident beam. The level of Brillouin backscatter gain in the presence of transverse flow is less than that in the absence of transverse flow because of convective damping, where ion acoustic waves are swept out of the high intensity regions(s) of a beam. {copyright} {ital 1999 American Institute of Physics.}

• OSTI ID: 295522
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 2 Vol. 6; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BACKSCATTERING
BRILLOUIN EFFECT
DAMPING
ION ACOUSTIC WAVES
PLASMA SIMULATION