Investigation of gyrotron-based collective Thomson scattering for fast ion diagnostics in a compact high-field tokamak  

作　　者：徐登峰 黄梅 陈曦璇 张峰 夏冬辉 王之江 潘垣 Dengfeng XU;Mei HUANG;Xixuan CHEN;Feng ZHANG;Donghui XIA;Zhijiang WANG;Yuan PAN(International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics,State Key Laboratory of Advanced Electromagnetic Engineering and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,People's Republic of China;Southwestern Institute of Physics,Chengdu 610041,People's Republic of China)

机构地区：[1]International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics,State Key Laboratory of Advanced Electromagnetic Engineering and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,People's Republic of China [2]Southwestern Institute of Physics,Chengdu 610041,People's Republic of China

出　　处：《Plasma Science and Technology》2023年第6期14-22,共9页等离子体科学和技术（英文版）

基　　金：supported by the National MCF Energy R&D Program of China(No.2019YFE03020003);partly supported by the Key Research and Development Program of Hubei Province(No.2021BAA167);National Natural Science Foundation of China(No.51821005)。

摘　　要：As a promising method for fast ion diagnostics,collective Thomson scattering(CTS)can measure the one-dimensional velocity distribution of fast ions with high spatial and temporal resolution.The feasibility of diagnosing fast ions in a compact high-field tokamak by CTS was studied in this work,and the results showed that a wide range of probing frequencies could be applied.A high-frequency case and a low-frequency case were mainly considered for fast ion diagnostics in a compact high-field tokamak.The use of a high probing frequency could effectively avoid the refraction effect of the beams,while the application of a low probing frequency allows greater flexibility in the selection of scattering angle which may help to improve the spatial resolution.Based on typical plasma conditions(B_(0)=12.2 T,n_(e0)=4.3×10^(20)m^(-3),T_(e0)=22.2 keV,T_(i0)=19.8 keV)for a compact high-field tokamak,a220 GHz CTS diagnostic that utilizes a small scattering angle ofθ=30°and a 160 GHz CTS diagnostic that utilizes an orthogonal geometry were proposed.Further study showed that the high-frequency case could operate in a wider range of plasma conditions and provide more information on fast ions while the low-frequency case could achieve higher spatial resolution of the poloidal direction.

关 键 词：fast ion collective Thomson scattering GYROTRON 

分 类 号：TL631.24[核科学技术—核技术及应用]