Spatiotemporal evolution of parametric instabilities driven by short laser pulses: Two-dimensional analysis

Journal Article · Mon Sep 01 04:00:00 EDT 1997 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.872476· OSTI ID:538480

McKinstrie, C J ^[1]; Turano, E J ^[2]

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1. Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627 (United States)
2. Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627 (United States)

The spatiotemporal evolution of parametric instabilities such as stimulated Raman scattering is studied analytically in time and two spatial dimensions. Initial and boundary conditions are chosen to represent the entrance, propagation, and exit of a laser pulse of finite extent convecting through a homogeneous collisional plasma with definite boundaries. For most scattering angles the growth is found to be dominated by two-dimensional effects with one-dimensional amplitudes being valid for only a small range of angles corresponding to near forward and near backward scattering. The sideward convection alters the spatiotemporal character of the instability and inhibits but does not suppress its growth. {copyright} {ital 1997 American Institute of Physics.}

• Research Organization: University of Rochester
• DOE Contract Number: FC03-92SF19460
• OSTI ID: 538480
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 9 Vol. 4; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAM-PLASMA SYSTEMS
COLLISIONAL PLASMA
CONVECTION
HOMOGENEOUS PLASMA
LASER RADIATION
PARAMETRIC INSTABILITIES
RAMAN EFFECT
SCATTERING