Tomography of emissivity for Doppler coherence imaging spectroscopy diagnostic in HL-2A
Tomography of emissivity for Doppler coherence imaging spectroscopy diagnostic in HL-2A
复制标题
用于 HL-2A 多普勒相干成像光谱诊断的发射率断层扫描
DOI：
10.1088/2058-6272/ac0490
复制
发表时间：
2021
影响因子：
1.7
通讯作者：
Xu Min
中科院分区：
文献类型：
--
作者：
Li Bingli;Wang Tianbo;Nie Lin;Long Ting;Liu Zijie;Wu Hao;Ke Rui;Wang Zhanhui;Yu Yi;Xu Min
在HL-2A托卡马克装置上采用了一种新的多普勒相干成像光谱（CIS）技术测量碳杂质的发射率和流量。在CIS诊断中，等离子体内部的发射率和流动轮廓分别由相机从线积分发射率和线平均流动测量。一个标准的推理方法，称为层析反演，是必要的。由于病态性质，这种反演相对具有挑战性。在这篇文章中，我们报告了最近的应用和比较两种不同的层析成像算法，高斯过程层析成像和Tikhonov层析成像，光强度测量CIS，包括可行性和基准研究。最后给出了HL-2A装置真实的测量数据的层析结果。
A newly developed Doppler coherence imaging spectroscopy (CIS) technique has been implemented in the HL-2A tokamak for carbon impurity emissivity and flow measurement. In CIS diagnostics, the emissivity and flow profiles inside the plasma are measured by a camera from the line-integrated emissivity and line-averaged flow, respectively. A standard inference method, called tomographic inversion, is necessary. Such an inversion is relatively challenging due to the ill-conditioned nature. In this article, we report the recent application and comparison of two different tomography algorithms, Gaussian process tomography and Tikhonov tomography, on light intensity measured by CIS, including feasibility and benchmark studies. Finally, the tomographic results for real measurement data in HL-2A are presented.