High Power Laser Science and Engineering, 2018, 6 (1): 010000e1, Published Online: Jul. 2, 2018   

Optimizing the cleanliness in multi-segment disk amplifiers based on vector flow schemes Download: 768次

Author Affiliations
Key Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Abstract
The objective of maintaining the cleanliness of the multi-segment disk amplifier in Shenguang-II (SG-II) is to reduce laser-induced damage for optics. The flow field of clean gas, which is used for the transportation of contaminant particles, is a key factor affecting the cleanliness level in the multi-segment disk amplifier. We developed a gas–solid coupling and three-dimensional flow numerical simulation model. The three-dimensional and two-phase flow model is verified by the flow-field smog experiment and the particle concentration measurement experiment with the 130-disk amplifier in SG-II. By optimizing the boundary conditions with the same flow rate, the multi-inlet vector flow scheme can not only effectively reduce the purging time, but also prevent the reverse diffusion of contaminant particles in the multi-segment disk amplifier and the deposition of contaminant particles on the surface of the Nd:glass.

Zhiyuan Ren, Jianqiang Zhu, Zhigang Liu, Xiaowei Yang. Optimizing the cleanliness in multi-segment disk amplifiers based on vector flow schemes[J]. High Power Laser Science and Engineering, 2018, 6(1): 010000e1.

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