Title :
Investigation on X-ray redistribution in cylindrical cavity
Author :
Wenyong Miao ; Yongkun Ding ; Kexi Sun ; Dongxian Lai ; Zhenglin Chen ; Hongbin Wang ; Jinxiu Cheng ; Zhijian Zheng ; Hansheng Peng
Author_Institution :
Res. Center of Laser Fusion, China Acad. of Eng. Phys., China
Abstract :
Summary form only given. Radiation energy transport and X-ray redistribution inside a high-Z hohlraum is a key in indirect-drive inertial confinement fusion. Experiments on x-ray redistribution along axis of gold cylindrical cavities have been performed on Xinguang-II laser facility. A time-resolved two-chroma X-ray imager has been set up, with time resolution of 12.6 ps and spatial resolution of 70 /spl mu/m. Radiation energy transport efficiency of 6% is obtained for the 400/spl times/1200/spl mu/m cylindrical cavity heated by an X-ray source with radiation temperature of 118 eV. Experimental scaling relation between thermal radiation delay time of the cavity inner wall and the incident X-ray intensity is also deduced. Comparison between the experimental results and a code predication has been made. Analysis of the angular distribution of X-ray intensity at the open end of the cavity indicates that the blow-off plasmas from cavity wall have influence on the angular distribution.
Keywords :
fusion reactor theory; plasma diagnostics; plasma transport processes; 118 eV; 12.6 ps; 6 percent; 70 micron; X-ray intensity angular distribution; X-ray redistribution; X-ray source; angular distribution; blow-off plasmas; cavity axis; cavity wall; cylindrical cavity; gold cylindrical cavities; high-Z hohlraum; indirect-drive inertial confinement fusion; radiation energy transport; radiation energy transport efficiency; radiation temperature; scaling relation; spatial resolution; thermal radiation delay time; time resolution; Delay effects; Energy resolution; Gold; Image resolution; Inertial confinement; Laser fusion; Plasma temperature; Spatial resolution; X-ray imaging; X-ray lasers;
Conference_Titel :
Plasma Science, 2002. ICOPS 2002. IEEE Conference Record - Abstracts. The 29th IEEE International Conference on
Conference_Location :
Banff, Alberta, Canada
Print_ISBN :
0-7803-7407-X
DOI :
10.1109/PLASMA.2002.1030364
