Usage of Ray Tracing Transfer Matrix to Mitigate the Stray Light for ITER Spectroscopy
Usage of Ray Tracing Transfer Matrix to Mitigate the Stray Light for ITER Spectroscopy
复制标题
使用光线追踪传递矩阵来减轻 ITER 光谱的杂散光
DOI：
10.1002/ctpp.201500124
复制
发表时间：
2016
影响因子：
1.6
通讯作者：
M. Walsh
中科院分区：
文献类型：
--
作者：
S. Kajita;E. Veshchev;R. Barnsley;M. Walsh
偏滤器明亮区域的光子在内壁反射形成的杂散光是ITER光谱测量系统中的一个严重问题。在这项研究中，我们提出了一种方法来减轻杂散光的影响，使用光线跟踪分析。通常，光线跟踪模拟需要耗时的运行。根据光线追迹的模拟结果，我们构造了传输矩阵，并利用它们来演示杂散光的影响。结果表明，传输矩阵可以用来重建的发射轮廓考虑杂散光的影响，而无需任何额外的光线追迹运行。研究了ITER偏滤器杂质监测器中杂散光的抑制方法，提出了偏滤器区刮除层光谱杂散光水平的预测方法。（© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA，魏因海姆）
Stray light formed by the reflection of photons on inner wall from a bright divertor region can be a serious issue in spectroscopic measurement systems in ITER. In this study, we propose a method to mitigate the influence of stray light using a ray tracing analysis. Usually, a ray tracing simulation requires a time consuming runs. We constructed transfer matrices based on the ray tracing simulation results and used them to demonstrate the influence of stray light. It is shown that the transfer matrix can be used to reconstruct the emission profile by considering the influence of the stray light without any additional ray tracing runs. Mitigation of the stray light in ITER divertor impurity monitor was demonstrated, and a method of prediction of the stray light level for the scrape off layer spectroscopy from divertor region was proposed. (© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)