2 DIMENSIONALLY SPACE-RESOLVED ELECTRON-TEMPERATURE MEASUREMENT OF LASER CREATED FUSION PLASMAS

Electron temperature distributions of laser created fusion plasma were measured by using toroidally bent Bragg crystals. Tiny amount of argo n was seeded in deuterium fuel gas and monochromatic images of Ar+17 ( 1s-3p) Ly beta and Ar+16 (1S(2)-1s3p) He beta lines were taken to prov ide temperature distribution of the compressed core from their intensi ty ratios. A fusion core created by laser-generated x rays in a micro- cavity showed the temperature structure corresponding to the illuminat ion asymmetry caused by the cavity irradiation geometry. The experimen tal distribution of the line-ratio of Ly beta to He beta was compared with the postprocessed outputs from one dimensional simulation, assumi ng perfect spherical implosion, to discuss degradation of pellet implo sion.