The stimulated Raman threshold. I. Experiment
- 1 November 1986
- journal article
- research article
- Published by AIP Publishing in Physics of Fluids
- Vol. 29 (11) , 3864-3872
- https://doi.org/10.1063/1.865770
Abstract
The threshold intensity for excitation of the stimulated Raman backscatter instability has been measured at 9.58 μm in a well‐diagnosed plasma free of Brillouin scattering. The initial level of density fluctuations was independently measured by ruby laser scattering. The observed threshold of 1×1011 W/cm2 is somewhat below the calculated ‘‘absolute’’ threshold for underdense plasmas, and the apparent noise level is higher than that measured directly.Keywords
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