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Measurements are reported of short-pulse (100 psec), 1.06-{μ}m laser backscatter from a high-pressure nitrogen gas target. Spectral measurements clearly show the expected Brillouin red shift. The backscatter fraction saturated at {~}40% at 2×{}10¹⁵ W/cm² and what appears to be multiple Brillouin scattering in a long-gradient-length plasma is observed.
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Mayer et al. (1980) studied this question.
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