Z箍缩内爆等离子体双层丝阵负载设计的物理分析
Physical analysis for designing nested-wire arrays on Z-pinch implosion
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摘要: 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。Abstract: Z-pinch experiments have demonstrated that the X-ray power increases 40% with a nested-wire 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 single-layered wire array. Some suggestions are put
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Key words:
- z-pinch /
- nested-wire array /
- rayleigh-taylor instability
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