Z箍缩Al等离子体X特征辐射谱线数值模拟及考虑叠加效应后的修正  

Simulation of Z-pinch Al plasma radiation and correction with considering superposition effect

作　　者：高启[1] 张传飞[2] 周林[2] 李正宏[2] 吴泽清[3] 雷雨[1] 章春来[1] 祖小涛[1] 

机构地区：[1]电子科技大学物理电子学院,成都610054 [2]中国工程物理研究院核物理与化学研究所,绵阳621900 [3]北京应用物理与计算数学研究所,北京100088

出　　处：《物理学报》2014年第12期181-187,共7页Acta Physica Sinica

基　　金：国家自然科学基金-中国工程物理研究院联合基金(批准号:U1230124)资助的课题~~

摘　　要：采用基于细致能级的非局域热动平衡模型,对"强光一号"装置10174发次Z箍缩铝等离子体特征辐射谱进行细致的分析和计算,提取电子密度约为3.5×1021cm-3.数值计算结果显示,采用单一等离子体状态参数不能很好地描述等离子体辐射特征谱线.在进一步的分析计算中,本文初步考虑高温区域和低温区域等离子体特征辐射谱线的叠加效应,将等离子体划分为高温高密度和低温低密度两部分,分析了两部分等离子体辐射对总辐射谱的贡献,并给出了修正后的等离子体辐射谱线.考虑叠加效应后,Heα伴线显著增强,计算结果改善明显.In this article, the X ray special line radiation from Z-pinch Al plasma is calculated by using non-local-thermodynamic-equilibrium model （NLTE） based on digital energy level. The electron density of Z-pinch plasma at centre is obtained. The single plasma state parameter cannot well describe the special line radiation. In the next step, the Z-pinch plasma is divided into two parts： high electron temperature plasma at centre and low electron temperature plasma. The superposition of radiations from two parts is analyzed, and modified calculation result is presented. The calculation results are significantly improved after the superposition of radiations from two parts has been taken into account.

关 键 词：Z箍缩 非局域平衡模型 数值模拟 叠加效应 

分 类 号：O53[理学—等离子体物理]