Stimulated Raman scattering from a density maximum in a laser-produced plasma

Barr, H. C.; Boyd, T. J. M.; Mackwood, A. P.
June 1989
Physics of Fluids B: Plasma Physics;Jun89, Vol. 1 Issue 6, p1151
Academic Journal
Thresholds and growth rates for stimulated Raman scattering from a plasma density maximum, corresponding to laser–target burnthrough experiments, are obtained by numerical solution of the full-wave Raman scattering equations. This supplements and extends to new regimes the WKB analysis of Rosenbluth [Phys. Rev. Lett. 29, 565 (1972)] and the quasiglobal analysis of Williams and Johnston [Phys. Fluids B 1, 188 (1989)]. The results show unexpected scalings with laser intensity well above threshold, and permit absolutely unstable forward scattering with thresholds comparable to those for backward scattering.


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