Observation of laser scattering at ω0 and 2ω0 by a plasma region with a density well below the critical density
Aleksandrova I. V., Danilov A. E., Korn G., Orlov V. V., Sklizkov G. V., Fedotov S. I.
Experiments on spherical heating of fusion targets in the Del'fin-1 device reveal laser scattering at frequencies of ω0 and 1ω0 by a plasma region with a density well below the critical density. For each of the frequencies, the size of the emission region is roughly four times the initial target diameter, and the region has a sharp boundary. Some possible explanations for the observations are proposed.