Stimulated Compton scattering from preformed underdense plasmas

Details Stimulated Compton scattering from preformed underdense plasmas Stimulated Compton scattering from preformed underdense plasmas

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phrvl..67.1434l&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 67, Sept. 9, 1991, p. 1434-1437. Research supported by Lawrence Livermore Nationa

Physics

22

Carbon Dioxide Lasers, Compton Effect, Electromagnetic Scattering, Electron Density (Concentration), Laser Beams, Plasma Density, Electromagnetic Radiation, Hydrogen Plasma

Scientific paper

The electron-density-fluctuation spectra induced by stimulated Compton scattering (SCS) are directly observed for the first time. A CO2 laser is focused into plasmas with densities n(e) spanning (0.4-6) x 10 to the 16th/cu cm. The fluctuations corresponding to backscatter are probed using Thomson scattering. At low n(e), the scattered spectrum peaks at a frequency shift delta omega = kv(e) and appears to be in a linear convectively saturated regime. At the highest n(e), a nonlinear saturation of the SCS instability is observed possibly due to a self-induced perturbation of the electron distribution function.

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