A new dump system design for stray light reduction of Thomson scattering diagnostic system on EAST
A new dump system design for stray light reduction of Thomson scattering diagnostic system on EAST
复制标题
EAST上汤姆逊散射诊断系统杂散光减少的新型转储系统设计
DOI：
10.1063/1.4959185
复制
发表时间：
2016-07-01
影响因子：
1.6
通讯作者：
Zhao, Junyu
中科院分区：
文献类型：
--
作者：
Xiao, Shumei;Zang, Qing;Zhao, Junyu
汤姆逊散射（TS）诊断是测量等离子体放电过程中电子温度和密度的重要诊断方法。然而，汤姆逊散射信号的测量容易受到杂散光的干扰。通过建立诊断系统的仿真模型，对实验先进超导托卡马克（EAST）TS诊断系统的杂散光源进行了分析，仿真结果表明转储系统是主要的杂散光源。基于光学理论和模拟分析，提出并安装了一种新型的包括改进型光束阱的转储系统。测量结果表明，新的转储系统可以减少60%以上的杂散光的诊断系统，杂散光对测量密度的误差的影响减小。出版社：AIP Publishing
Thomson scattering (TS) diagnostic is an important diagnostic for measuring electron temperature and density during plasma discharge. However, the measurement of Thomson scattering signal is disturbed by the stray light easily. The stray light sources in the Experimental Advanced Superconducting Tokamak (EAST) TS diagnostic system were analyzed by a simulation model of the diagnostic system, and simulation results show that the dump system is the primary stray light source. Based on the optics theory and the simulation analysis, a novel dump system including an improved beam trap was proposed and installed. The measurement results indicate that the new dump system can reduce more than 60% of the stray light for the diagnostic system, and the influence of stray light on the error of measured density decreases. Published by AIP Publishing.