高速CT阻滞产生X射线辐射的数值模拟研究  

Numerical simulation for X-ray radiation emitted from a rapidly translating CT stagnated against a rigid wall

作　　者：王震涛[1] 王尚武[1] 肖亚斌[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,长沙410073

出　　处：《核聚变与等离子体物理》2008年第1期34-39,共6页Nuclear Fusion and Plasma Physics

基　　金：国防科学技术大学预研基金资助项目

摘　　要：以Ar等离子体为例,应用一维辐射流体力学模型,对高速度、高密度的紧凑等离子体环(CT)撞击静态靶减速产生软X射线辐射的物理过程进行了数值模拟研究。利用分裂格式方法计算得到了描述碰撞物理过程的各力学量随时间的演化关系,以及固定CT动能时使停滞CT成为最有效辐射源的初始速度和质量的最优搭配。对计算过程中相关物理量的跟踪分析表明,在1%的误差范围内计算格式满足能量守恒方程。The physical process of X-ray radiation emitted from the rapidly translating CT （compact toroidal plasma）, consisting of Ar plasma, colliding against an ideal stationary wall is numerically simulated by resolving the 1-D RHD equations. The time-dependent physical parameters during collision are presented by means of splitting scheme, and the optimized values of mass and initial velocity of the CT as an efficient radiation source are investigated when the kinetic energy of CT is fixed. The results show that the numerical scheme conserves total energy with the relative error less than 1%.

关 键 词：紧凑等离子体环 软X射线辐射 辐射流体力学 辐射产额 辐射塌缩 

分 类 号：O536[理学—等离子体物理]