Analysis of baffles for stray light reduction in the Thomson scattering diagnostic on EAST
Analysis of baffles for stray light reduction in the Thomson scattering diagnostic on EAST
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DOI：
10.1016/j.fusengdes.2016.02.071
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发表时间：
2016-04
影响因子：
1.7
通讯作者：
Xia Shumei;A. Hu;Hui Chen;Xiaofeng Han;T. Wang;Q. Zang;Junyu Zhao
中科院分区：
文献类型：
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作者：
Xia Shumei;A. Hu;Hui Chen;Xiaofeng Han;T. Wang;Q. Zang;Junyu Zhao
挡板是抑制杂散光的一种关键技术。为了降低东汤姆逊散射(TS)诊断系统的杂散光，该系统安装了60°锥角双边缘挡板阵列。最近设计的45°锥角波纹挡板是基于双刃挡板的，仿真结果表明，新的设计比原来的设计可以多滤除33.3%的杂光。根据EAST TS诊断系统的机械结构和表面特性，建立了EAST TS诊断系统的杂散光分析模型，并利用该模型分别在系统中添加了两种类型的遮光板，对系统的杂光进行了模拟。结果表明，在输入管内安装60°锥角双面波折流板阵列，可去除系统92.1%的杂光；在输入管内安装45°锥角波纹挡板阵列，在出口管内安装3个45°锥角波纹挡板，可额外去除74.1%的杂光。
Baffle is a critical technique to suppress stray light. In order to reduce stray light of EAST Thomson scattering (TS) diagnostic system, a 60° cone angle double edged baffle array was installed for the system. Recently the 45° cone angle corrugation baffle was designed based on double edged baffle and simulation results indicate that the new design can reject 33.3% more stray light than the old one. Based on the mechanical structure and surface property of EAST TS diagnostic system, a stray light analysis model has been built, and using the model, stray light of the system was simulated with the two types of baffles added to the system respectively. Results show that the installation of 60° cone angle double edged baffle array in input tube can cut 92.1% of the stray light to the system, while using 45° cone angle corrugation baffle array in input tube and three 45° cone angle corrugation baffles in exit tube, additional 74.1% of the stray light will be removed.