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

作者：Shijian Meng, Qingyuan Hu, Jiaming Ning, Fan Ye, Zhanchang Huang, Yi Qin, Dong Wang, Zeping Xu, Rongkun Xu · 发表于：Physics of Plasmas · 年份：2017 · DOI：10.1063/1.4974771 · 被引用次数：15 · 研究领域：Laser-Plasma Interactions and Diagnostics、High-pressure geophysics and materials、Laser-Matter Interactions and Applications

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/μs 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 ∼1 mm 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 ∼65 eV.