Abstract
We have developed a multi‐channel UV Collective Thomson Scattering (CTS) system for plasmas produced by short wavelength lasers. The CTS diagnostic allows us to make significant improvement in the understanding of plasma wave instabilities. Previously, the IADI was studied by measuring the second harmonic (SH) emissions. The SH emissions are produced by the product of two unknown plasma waves, and integrated over the wave number, the propagation angle, and the plasma density. Using the CTS, we can directly measure an electron plasma wave, and an ion acoustic wave for a selected wave number, and a propagation angle. It is shown that the IADI is important in a large scale, hot plasma relevant to laser fusion. An important application is that the UV CTS from the IADI is a good diagnostic tool for a local electron temperature (Te) measurement.
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