Electron density measurement by the three boundary channels of HCOOH laser interferometer on the HL-3 tokamak  

作　　者：牟俊任 李永高 李远 王再宏 丁宝钢 王浩西 易江 石中兵 Junren MOU;Yonggao LI;Yuan LI;Zaihong WANG;Baogang DING;Haoxi WANG;Jiang YI;Zhongbing SHI(Southwestern Institute of Physics,Chengdu 610041,People's Republic of China;East China Normal University,Shanghai 200241,People's Republic of China)

机构地区：[1]Southwestern Institute of Physics,Chengdu 610041,People's Republic of China [2]East China Normal University,Shanghai 200241,People's Republic of China

出　　处：《Plasma Science and Technology》2024年第3期88-93,共6页等离子体科学和技术（英文版）

基　　金：supported by the National Magnetic Confinement Fusion Science Program of China(Nos.2019YFE03020004,2018YFE0304102 and 2019YFE03020002);the Department of Science and Technology of Sichuan Province(No.2020YJ0463)。

摘　　要：Far-infrared(FIR)interferometer is widely used to measure the electron density in the magnetically confined fusion plasma devices.A new FIR laser interferometer with a total of 13 channels(8 horizontal channels and 5 oblique channels)is under development on the HL-3tokamak by using the formic-acid laser(HCOOH,f=694 GHz).In order to investigate the boundary electron density activity during the divertor discharge,three horizontal interferometry channels located at Z=-97,-76,76.5 cm have been successfully developed on HL-3 in 2023,and put into operation in recent experimental campaign,with a time resolution of<1.0μs and lineintegrated electron density resolution of~7.0×10^(16) m^(-2).This paper mainly focuses on the optical design of the three-channel interferometry system,as well as optical elements and recent experimental result on HL-3.

关 键 词：electron density INTERFEROMETER HL-3 

分 类 号：TL631.24[核科学技术—核技术及应用]