Optimizing the cleanliness in multi-segment disk amplifiers based on vector flow schemes  

作　　者：Zhiyuan Ren Jianqiang Zhu Zhigang Liu Xiaowei Yang 

机构地区：[1]Key Laboratory on High Power Laser and Physics Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences,Shanghai 201800, China

出　　处：《High Power Laser Science and Engineering》2018年第1期1-6,共6页高功率激光科学与工程（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 61505228)

摘　　要：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.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.

关 键 词：CLEANLINESS computational fluid dynamics flow field multi-segment disk amplifier vector flow 

分 类 号：O4[理学—物理]