Z箍缩内爆的MARED程序数值模拟分析  

Numerical simulation analysis of Z-pinch implosion using MARED code

作　　者：丁宁[1] 邬吉明[1] 戴自换[1] 张扬[1] 尹丽[1] 姚彦忠[1] 孙顺凯[1] 宁成[1] 束小建[1] 

机构地区：[1]北京应用物理与计算数学研究所,北京100094

出　　处：《物理学报》2010年第12期8707-8716,共10页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10975022;10775021;10575014);国家自然科学基金重点项目(批准号:10635050);国防基础科学研究计划(批准号:A1520070074)资助的课题~~

摘　　要：MARED程序是模拟Z箍缩内爆过程的二维三温辐射磁流体力学程序,它适用于不同装置条件和不同负载参数.利用MARED程序对Z箍缩内爆进行模拟,结合丝阵Z箍缩实验分析表明:相同负载质量条件下,钨丝阵内爆产生的X射线辐射功率远大于铝丝阵产生的X射线功率;相同负载电流条件下,负载质量越大,计算得到的X射线功率越低;X射线功率随着负载电流增加而增加.MARED程序能够较好地反映Z箍缩内爆动力学过程,特别是不稳定性发展的二维图像,能够给出与不稳定性简化模型的理论分析及实验结果定性一致的演化规律.MARED程序模拟丝阵填充泡沫形成辐射场的初步计算得到了与Sandia实验室模拟Z装置上丝阵填充泡沫定性一致的结果.To develop reliable numerical simulation tools is very important for the theoretical research,the experimental analysis and the load designing of Z-pinch implosions.A dedicated Z-pinch implosion physical scheme of the two-dimensional numerical simulation of three-temperature radiation magnetohydrodynamics MARED code is introduced.The results of its one-dimensional test demonstrate that the MARED code is suited for simulating implosions on different devices and in a wide range of load parameters.A combination between the simulations and the measurements of the wire-array Z-pinch experiment shows that under the same load conditions,the X-ray radiation power produced by the tungsten wire-array implosion is much higher than that generated by the aluminum wire array.With the same load current,a greater load mass gains a lower X-ray power.However,the X-ray radiation power increases with the load current.The MARED code is found to be able to reproduce the primary dynamic characteristics of the Z-pinch implosions,and the development of the instability qualitatively aecords with the simplified instability theoretical analysis and experimental results.It is also used to simulate the radiation field formation of the wire-array with filling column at the axis,and its preliminary results are qualitatively consistent with the simulation results from the Sandia laboratory.

关 键 词：丝阵Z箍缩内爆等离子体 MARED程序 辐射磁流体力学数值模拟 X射线辐射 

分 类 号：O536[理学—等离子体物理]