The tri-band high spectral resolution spectrometer with gratings in tandem for the charge-exchange recombination spectroscopy diagnostic system on HL-2A tokamak  

作　　者：刘亮 余德良 马倩 何小斐 Maarten DE BOCK Manfred von HELLERMANN Michael WALSH 陈文锦 何小雪 魏彦玲 张能 李栋 魏会领 the HL-2A Team Liang LIU;Deliang YU;Qian MA;Xiaofei HE;Maarten DE BOCK;Manfred von HELLERMANN;Michael WALSH;Wenjin CHEN;Xiaoxue HE;Yanling WEI;Neng ZHANG;Dong LI;Huiling WEI;the HL-2A Team(Southwestern Institute of Physics,Chengdu 610041,People’s Republic of China;College of Physics and Optoelectronic Technology,Baoji University of Arts and Sciences,Baoji 721000,People’s Republic of China;ITER Organization,Route de Vinon-sur-Verdon,CS 90046,St.Paul Lez Durance Cedex 13067,France;Fusion Spectroscopy,Markgraf-Albrecht Str.14,Berlin 10711,Germany)

机构地区：[1]Southwestern Institute of Physics,Chengdu 610041,People’s Republic of China [2]College of Physics and Optoelectronic Technology,Baoji University of Arts and Sciences,Baoji 721000,People’s Republic of China [3]ITER Organization,Route de Vinon-sur-Verdon,CS 90046,St.Paul Lez Durance Cedex 13067,France [4]Fusion Spectroscopy,Markgraf-Albrecht Str.14,Berlin 10711,Germany

出　　处：《Plasma Science and Technology》2024年第6期103-110,共8页等离子体科学和技术（英文版）

基　　金：supported in part by National Natural Science Foundation of China (Nos.12275070, 12205084, 12305236 and 11675050);in part by the National Key Research and Development Program of China (Nos. 2022YFE03180200, 2022YFE03020001 and 2019YFE03010004);Innovation Program of Southwestern Institute of Physics (No. 202301XWCX001)。

摘　　要：Charge-exchange(CX) recombination spectroscopy is a powerful tool monitoring ion temperature and plasma rotation with good temporal and spatial resolutions. A compact, new design for a high-throughput, tri-band high spectral resolution spectrometer has been developed for the charge-exchange recombination spectroscopy measurement on the HL-2A tokamak. The simultaneous measurements of He II(468.57 nm), C VI(529.1 nm), and Dα(656.1 nm accompanied by beam emission spectra) with an acquisition frequency up to 400 Hz are achieved by vertically binning the spectrum from each fiber in experiments. Initial results indicate that the system can provide radial profiles of not only ion temperature and rotation velocity,but also concentration of carbon. For the case of helium, the measurements for the ion temperature and rotation velocity are straightforward but the apparent concentration associated with the observed CX intensity is obviously too high. Modeling of the active He II CX feature including plume contributions needs to be carried out to extract the true helium concentration.The spectrometer could become a prototype for the ITER charge-exchange recombination spectroscopy diagnostic and the pilot experiments, as presented here, demonstrate the possibility of impurity concentrations measurements based on the combined measurement of local beam emission and charge-exchange recombination spectroscopy spectra.

关 键 词：CXRS ion temperature plasma rotation impurity concentration 

分 类 号：TL631.24[核科学技术—核技术及应用]