多种腔靶中的金M带辐射测量

摘要

利用2009年神光Ⅱ黑腔实验的数据，比较了不同腔靶中的金M带X光能量及发射时间过程。在实验中使用滤片选通的X光探测器在激光注入口方向测量到金M带时间过程，通过时间定标获得了可与激光时间过程相关联的金M带X光的发射时间行为。根据实验结果计算了辐射能量，结果表明：随着腔体尺寸的减小，激光能量转换到M带能量的份额也越多；随着激光能量的有限增加，对于大尺寸腔靶，Au的M带辐射量比较稳定，而对于标准腔靶和小尺寸靶，M带的能量会随之增加。%The evolution of gold M -band emission from different size of hohlraums was measured on Shenguang II laser facility.A band-pass x-ray detector consisted of a compound filter and a Al -cathode XRD was used to measure the intensity of M -band x-rays, and the temporal evolution of M band intensity was compared with the incident laser.The experimental observation indicates that higher energy conversion efficiency of laser to M-band x-ray was obtained by using small hohlraum , the M-band energy increased with the heating laser en-ergy for both standard hohlraum and half hohlraum and up to a constant for large hohlraum .