辐射烧蚀区电子温度研究

Investigation of electron temperature of radiation ablation region

此文叙述了采用晶体谱仪测量辐射烧蚀区电子温度的方法。在“星光Ⅱ”激光装置上 ,以波长为 0 .35μm ,能量～ 70J ,脉宽～ 70 0 ps的强激光注入辐射烧蚀靶 ,实验首次测到了辐射烧蚀样品自发射谱 ,配合理论计算 ,给出了碳氢样品电子温度 2 9eV。另外用空间分辨晶体谱仪研究了发泡铝靶电子温度空间分布 ;用双示踪元素等电子谱线法研究了Formvar(CHO)

Electron temperature is important for gaining an understanding of the physical processes involved in energy absorption and transport in plasmas, and these processes play a central role in the laser driven inertial confinement fusion. Electron temperature of the heating sample have been studied based on the actual condition of 'Xing Guang Ⅱ' laser facility. The 70 J, 350 nm laser, which has a duration of about 700 ps, irradiates on a newly designed target. The spectrum lines emitted from the heated CH sample has been measured by OHM crystal spectrometer, which has been used to determine temperature of the sample. The experimental results for opacity of carbon have been discussed. The profile of electron temperature of the aluminum targets has been studied. The average electron temperature of Formvar tergets has been obtained for fist time by isoelectronic line ratios.