Direct measurement of x-ray flux for a pre-specified highly-resolved region in hohlraum

作者：Ren, Kuan^*; Liu, Shenye; Hou, Lifei; Du, Huabing; Ren, Guoli; Huo, Wenyi; Jing, Longfei; Zhao, Yang; Yang, Zhiwen; Wei, Minxi; Deng, Keli; Yao, Li; Li, Zhichao; Yang, Dong; Zhang, Chen; Yan, Ji; Yang, Guohong; Li, Sanwei; Jiang, Shaoen; Ding, Yongkun; Liu, Jie; Lan, Ke

来源：Optics Express, 2015, 23(19): A1072-A1080.

DOI：10.1364/OE.23.0A1072

• STREAK CAMERA
• PLASMAS

A space-resolving flux detector (SRFD) is developed to measure the X-ray flux emitted from a specified region in hohlraum with a high resolution up to 0.11 mm for the first time. This novel detector has been used successfully to measure the distinct X-ray fluxes emitted from hot laser spot and cooler re-emitting region simultaneously, in the hohlraum experiments on SGIII prototype laser facility. According to our experiments, the ratio of laser spot flux to re-emitted flux shows a strong time-dependent behavior, and the area-weighted flux post-processed from the measured laser spot flux and re-emitting wall flux agrees with that measured from Laser Entrance Hole by using flat-response X-ray detector (F-XRD). The experimental observations is reestablished by our two-dimensional hydrodynamic simulations and is well understood with the power balance relationship.

• 出版日期2015-9-21
• 单位中国工程物理研究院激光聚变研究中心; 北京大学; 中国工程物理研究院; 华中科技大学; 北京应用物理与计算数学研究所