钨丝阵等离子体Z箍缩的数值模拟

采用二维三温磁流体力学模型，模拟了“强光一号”加速器上钨丝阵箍缩实验.给出了等离子体密度和温度时空分布的特点，分析了磁场以及电流密度的演化，计算出的x射线功率随时间变化与实测结果基本相符.计算结果为等离子体的诊断提供了有用的信息.此外，还讨论了Z箍缩辐射磁流体力学数值模拟中的相关参数和数值方法问题. 关键词： 钨丝阵 Z箍缩 数值模拟

Numerical simulation of tungsten wire-array pinch plasma

A two dimensional, three temperature radiation magneto hydrodynamics model is applied to the simulation of tungsten wire array plasma implosion based on the real experimental parameters of the Qiangguang 1 generator. The spatial temporal evolutions of the plasma density and temperature are presented, and the characteristic of the magnetic field and current density is analyzed and summarized. The calculated x ray power curve is approximately in agreement with the corresponding measured one. All these predicted quantities are conducive to the plasma diagnoses of Z pinches. In addition, some of physical parameters and numerical schemes related to this simulation are discussed also.