Reemission technique for early time, hohlraum radiation symmetry measurements on SGⅡ facility

Progress of indirectly driven implosion experiments

“…若干关键物理量的实验研究方法 [21][22][23] , 包括: 早期对 称性 [24] 、飞行阶段对称性 [25] 、滞止阶段对称性 [26] 、流 体力学不稳定性、壳层内界面形貌, 以及内爆混合效 应 [27] 等; 掌握了分幅相机和条纹相机等高时间分辨X 射线成像设备的使用方法, 发展了球面弯晶单色成像 技术 [28] 、KB显微成像技术 [29] 、VISAR测量技术 [30] 等. 理论方面, 有能力用一维模拟去理解内爆实验结果.…”

Influence of Capsule Offset on Radiation Asymmetry in Shenguang-II Laser Facility

“…As shown in Fig. 1(b), the re-emitted images of the frame camera indicated that the high-Z (Bi) capsule deviated about 29 µm (about 25 µm axial offset) from the center of diagnostic hole (DH) during capsule assembly [13] in experiments of the Shenguang-Ⅱ(SG-Ⅱ) laser facility. This paper will use a new three dimensional (3D) view-factor code named IRAD3D [14−16] to analyze the influence of the capsule's offsets on its radiation asymmetry.…”

First integrated implosion experiments on the SG-III laser facility

“…The hohlraum energetics [2] and laserplasma interaction (LPI) [3] were studied on the SG-II platform. The implosion symmetry was also studied using the hohlraums of different lengths [4,5], and it was characterized by the shapes of the hotspot self-emissions. For the hydrodynamic instability, a series of experiments were performed to measured the growth rate of single-mode ablative Rayleigh-Taylor (RT) instability from linear to nonlinear regime [6], and to investigate the evolution of mixing at the shell-gas interface using capsules with the inner shells made of sulfur or phosphorus.…”