Measurement of axial radiation properties in Z-pinch dynamic hohlraum at Julong-1

作者：Meng, Shijian^*; Hu, Qingyuan; Ning, Jiaming; Ye, Fan; Huang, Zhanchang; Qin, Yi; Wang, Dong; Xu, Zeping; Xu, Rongkun

来源：Physics of Plasmas, 2017, 24(1): 014505.

DOI：10.1063/1.4974771

• X-RAY POWER
• FACILITY
• DRIVEN
• FUSION
• LOADS

Axial radiation properties in Z-pinch dynamic hohlraum is investigated experimentally for the first time at Julong-1 facility in China, employing a load that contains a cylindrical CHO foam placed at the central axis position of the nested tungsten wire array. Time-resolved axially radiating images indicate that the velocity of the radiating shock is 31.9 +/- 5.6 cm/mu s in shot 0181. At t = -6.5 ns with respect to the peak of radially radiated power at stagnation, the annular width is estimated to be similar to 1mm and the intensities distribution in the shock implies a good azimuthal symmetry of radiation pressure. Axial power is found to peak prior to the arrival of the shock to the axis, which is explained by the balance between shock heating and radiating cooling. Utilizing the end-on radiation images and axial power, the peak radiation temperature in dynamic hohlraum is obtained to be similar to 65 eV. Published by AIP Publishing.

• 出版日期2017-1
• 单位中国工程物理研究院; 中国工程物理研究院核物理与化学研究所