Collection Of theses on high power laser and plasma physics, 2014, 12 (1): 125210, Published Online: May. 27, 2017  

Diagnoses of Au plasma with soft X-ray double frequency grating interference technique

Author Affiliations
1 上海激光等离子体研究所, 上海 201800
2 中国科学技术大学, 国家同步辐射实验室, 合肥 230029
3 北京应用物理与计算数学研究所, 北京 100088
Abstract
The diagnoses of laser-produced plasma electron density have important significance for inertial confinement fusion, plasma physics, high energy density physics and other relevant fields, especially for measuring electron density distribution information of medium and high-Z material plasma near the critical density surface. With 13.9 nm Ni-like Ag X-ray laser serving as a probe, using double frequency grating shearing interference technique, the electron density distribution of plasma produced by laser irradiating a gold planar target is measured. Clear interference fringe image is obtained. Preliminary deduction of the fringe shows that the maximum density measured is about 1.4 times the critical density. It is found that there are some discrepancies between experimental results and simulation results, which provides a useful reference to the further optimization of the simulation program. The experimental results fully demonstrate that the soft X-ray double frequency grating shearing interference technique is practical to diagnose near-critical-density plasma of medium and high-Z materials, which will have a good application value.

Wang Chen, An Hong-Hai, Wang Wei, Fang Zhi-Heng, Jia Guo, Meng Xiang-Fu, Sun Jin-Ren, Liu Zheng-Kun, Fu Shao-Jun, Qiao Xiu-Mei, Zheng Wu-Di, Wang Shi-Ji. Diagnoses of Au plasma with soft X-ray double frequency grating interference technique[J]. Collection Of theses on high power laser and plasma physics, 2014, 12(1): 125210.

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