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Rayleigh-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.

Z-pinch experiments have demonstrated that x-ray power was increased more 40% with a nested-wire array than with a wire array.The designs of nested-wire arrays on Z accelerator are studied through the implosion dynamics and the growth of RT instabilities.The analysis shows that a nested-wire array does not produce more total x-ray radiation energy than a wire array,but it obviously increases x-ray power.The radius of outer array of nested-wire array should be selected as one of an optimized wire array,and the inner array is arranged in the middle of the outer array to mitigate the instabilities.The mass of outer and inner arrays may be decided according to the implosion time of designing nested-wire array,which should roughly be the same as it of an optimized wire array.Some suggestions put forward in this paper are helpful in designs of the nested-wire arrays for Z-pinch experiments.