“碰撞-辐射”模型在Z箍缩等离子体K壳层线辐射谱分析中的应用  

Application of a collisinal-radiative model for the analysis of K-shell line spectra emitted by Z-pinch plasma

作　　者：李晶[1,2] 谢卫平[1] 黄显宾[1] 杨礼兵[1] 蔡红春[1] 蒲以康[2] 

机构地区：[1]中国工程物理研究院流体物理研究所,绵阳621900 [2]清华大学工程物理系,北京100084

出　　处：《物理学报》2010年第11期7922-7929,共8页Acta Physica Sinica

基　　金：国家自然科学基金重点项目(批准号:10635050);中国工程物理研究院双百人才基金(批准号:2009R0103)资助的课题~~

摘　　要：介绍了由K壳层谱线强度比估算等离子体状态参数的"碰撞-辐射"模型的基本原理.详细描述了自行研制的基于该模型的Z箍缩等离子体K壳层线辐射谱分析程序——ZSPEC的基本情况.给出了氖等离子体的计算结果,包括不同电离态离子的相对含量随电子温度的变化曲线和K壳层谱线强度比在"电子密度-电子温度"平面内的等高线分布图.该程序已在"阳"加速器Z箍缩实验结果分析中得到应用,将椭圆晶体谱仪测得的氖等离子体K壳层谱线强度比与ZSPEC程序计算结果相比较,得出在该发实验540kA峰值电流的驱动下,产生K壳层辐射的等离子体的时空平均的电子温度和电子密度约为240eV和1.0×1019cm-3.In this paper,the principle of the collisional-radiative model for the estimation of plasma parameters from the ratios of K-shell spectral lines was introduced.The structure of a computer program,ZSPEC,developed for the analysis of K-shell line spectra emitted by Z-pinch plasma based on the collisioanl-radiative model was described in detail.The calculation for neon plasma were presented,including the number fractions of major ionization stages at different electron temperature and the contours of K-shell line ratios in the plane defined by electron density and electron temperature.ZSPEC had been used to analyze the measured results of neon gas-puff Z-pinch experiment performed on Yang accelerator.By comparing the Kshell line ratios of neon plasma obtained by an elliptical crystal spectrometer with the results calculated by ZSPEC,the time and space averaged electron temperature and electron density of the K-shell plasma for the shot with 540 kA peaking current were determined to be 240 eV and 1.0 × 1019 cm-3,respectively.

关 键 词：“碰撞-辐射”模型 K壳层线辐射谱 氖气喷气Z箍缩 “阳”加速器 

分 类 号：O536[理学—等离子体物理]