辐射加热铝K_a吸收谱测量  

Measurement of radiation-heated aluminum K_a absorption spectra

作　　者：杨家敏[1] 张继彦[1] 丁耀南[1] 杨国洪[1] 靳凤涛[2] 袁建民[2] 李军[1] 汪艳[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心 [2]国防科学技术大学应用物理学院,长沙410073

出　　处：《强激光与粒子束》2007年第9期1483-1486,共4页High Power Laser and Particle Beams

基　　金：国家863计划项目资助课题

摘　　要：铝Ka吸收谱是诊断辐射加热等离子体温度的重要方法之一。在星光Ⅱ激光装置上,利用激光金膜相互作用产生的X光辐射加热其背侧的铝夹层样品,采用天津Ⅲ号胶片记录的PET晶体谱仪测量了不同激光和样品参数条件下的铝Ka吸收谱。实验观察到非常清晰的类氦到类氟铝离子Ka吸收谱线,采用细致组态模型开展了铝Ka吸收谱的模拟计算,模拟计算结果与实验结果符合得较好,研究结果可应用于辐射不透明度样品温度诊断。The Ka absorption spectrum is one of the important methods to determine the temperature of radiation-produced plasmas. The CH-sandwiched aluminum foil, deposited on the back surface of the gold foil, was heated by the X-ray radiation from the laser-irradiated gold foil on the Xingguang Ⅱ laser facility. The K, absorption spectra for various thickness aluminum samples were measured with the PET crystal spectrometer. Obvious K, absorption lines from He-like to F-like A1 ions were observed. As comparison, the aluminum K, absorption spectra at different temperatures and densities were also calculated using the detailed term accounting（DTA） model. The simulated spectra are in good agreement with the experimental ones, which can be applied to determine the sample temperature in opacity experiments.

关 键 词：铝Ka 吸收谱 温度诊断 细致组态模型 辐射不透明度 

分 类 号：O536[理学—等离子体物理] O562.3[理学—物理]