Z箍缩等离子体内爆实验金属丝阵负载优化设计分析

金属丝阵Z箍缩(Z-pinch)内爆是产生强x射线辐射的重要方法之一.在一定脉冲功率加速器条件下，金属丝阵质量和丝阵半径的选择决定了Z-pinch内爆等离子体辐射产额的大小.采用薄壳模型计算了不同丝阵质量、不同丝阵半径、不同粗细和不同材料金属丝构成的丝阵的内爆时间、内爆轨迹、内爆速度，以及最大动能和动能转换率，综合分析了丝间隙、内爆时间、动能转换率与丝阵质量和丝阵半径的关系，给出了在一定负载驱动电流条件下，金属丝阵的最佳参数.分析表明计算结果与实验上观察得到的内爆规律一致.关键词：Z-pinch内爆等离子体金属丝阵负载薄壳模型

Optimization design of a wire array load for Z-pinch plasma implosion experiments

The Z-pinch implosion from a wire array load is one of the ways to generate strong x-ray radiation. Under the conditions of a pulsed power accelerator, the x-ray radiation yield is determined by the initial diameter chosen and mass per length of a wire array load. In this paper, the effects of the mass, the array diameter and wire diameter, as well as the array material on the implosion time, the implosion trajectory, the implosion velocity and the kinetic energy are estimated by using an infinitely thin annular shell model. The relationship among the implosion time, the implosion kinetic energy and the initial array load parameters is analyzed. The optimized parameters of a wire array load are obtained under the given conditions of a driven current. Our conclusions by using the thin shell model are in agreement with the experimental results. Hence, the thin shell model can be used to design a wire array load of Z-pinch implosion experiment.