铝丝阵等离子体K壳层辐射区域测量

Measurement of K-shell radiation distribution in aluminum wire array plasma

采用球面云母晶体,在特定的几何布局下,通过选择适当的设计参数,在1.3 MA脉冲功率装置上获得了Lyα线表征的Z箍缩铝丝阵等离子体K壳层辐射时间积分2维分布。与通常采用的带滤片卡域的时间积分针孔成像相比,避免了由于无法将测量能段准确设定在K壳层辐射谱线所在能区,而造成测量结果偏离真实的K壳层辐射分布的缺点,为模拟计算Z箍缩等离子体辐射输运程序提供了更为精确的校验参数。

The time-integrated two-dimensional distribution of aluminum wire array Z-pinch plasma K-shell radiation which is characterized by Lya line was measured in a 1.3 MA generator, with spherically bent mica crystal in a specific layout of appro priate design parameters. The employment of spherically bent crystal instead of filter can realize accurate setting of measurement energy region and thus effectively improve the measurement accuracy of K-shell radiation distribution. The results presented provide more accurate calibration parameters for the radiation transport codes of Z-pinch plasma.