Oblique Stimulated Raman Scattering of a Short Laser Pulse in a Plasma Channel

Turano, E.J. ; McKinstrie, C.J.

Lawrence Livermore National Laboratory

关键词: Dimensions;    Amplitudes;    Scattering;    Boundary Conditions;    Parametric Instabilities;   

DOI  :  10.2172/793447
RP-ID  :  UCRL-ID0137815
RP-ID  :  W-7405-Eng-48
RP-ID  :  793447

美国|英语

来源: UNT Digital Library

【 摘 要 】

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 as it progresses through a homogeneous collisional plasma channel. For most scattering angles daughter wave growth is enhanced by lateral reflections within the channel. At late times the two-dimensional interaction approaches a one-dimensional damped mode in which the dissipative loss from lateral transmission of the Stokes wave through the channel boundaries is equivalent to an overall damping of the Stokes amplitudes within the channel.