Z箍缩内爆等离子体双层丝阵负载设计的物理分析

实验证实双层金属丝阵负载Z箍缩内爆等离子体产生的X光辐射源,与单层丝阵负载相比可以提高40%的功率。为了优化Z装置上双层丝阵负载实验方案的设计,从内爆动力学过程和Rayle igh-Taylor(RT)不稳定性发展过程进行了理论分析。分析表明:双层丝阵负载实验不会提高X光辐射的总能量,但可以明显地提高辐射功率;双层丝阵的外半径应与单层丝阵负载优化方案的半径相一致;双层丝阵内、外层质量的选取应以优化的单层丝阵内爆到心时间为标准;内层丝阵置于外层丝阵半径的正中位置上,更有利于抑制RT不稳定性。

Physical analysis for designing nested-wire arrays on Z-pinch implosion

Z-pinch experiments have demonstrated that the X-ray power increases 40% with a nested-wlre array compared with that with a single-layered wire array. The design of the nested-wire array on Z accelerator is studied through the implosion dynamics and the growth of RT instabilities. The analysis shows that the nested-wrie array does not produce more total X-ray radiation energy than the single-layered wire arrya, but it obviously increases the X-ray power. The radius of the outer array of the nested-wire array could be determined based on the radius of the optimized single-layered wire array. The masses of the outer and inner arrays could be determined by the implosion time of the nested-wire array, which is roughly the same as that of the singlelayered wire array. Some suggestions are put forward which may be helpful in the nested-wire array design for Z-pinch experiments.