Laser-plasma interaction experiments in long-scale length, 0.25 n_cr gas plasmas*
Abstract
Experiments have been performed using gas-filled toroidal hohlraums to produce plasmas with ne = 0.15--0.25 n_cr, Te ~ 3 keV, and density scale length ~ 2 mm. The plasma density and ion wave damping are varied systematically using different gas species and target pressures. A high-intensity 351-nm laser is used to interact with the preformed plasma. Stimulated Brillouin scattering, stimulated Raman scattering, and 3/2ω light from two-plasmon decay are measured for the interaction beam. We will present initial experimental results of the scaling of these instabilities with plasma density and ion species, and will discuss correlations observed in the data. *This work is supported by the U.S. Department of Energy.
- Publication:
-
APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- November 1996
- Bibcode:
- 1996APS..DPP..4E04M