摘要
A newly developed Doppler coherence imaging spectroscopy(CIS)technique has been implemented in the HL-2 A 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.
作者
李兵利
王天博
聂林
龙婷
刘自结
吴豪
柯锐
王占辉
余羿
许敏
Bingli LI;Tianbo WANG;Lin NIE;Ting LONG;Zijie LIU;Hao WU;Rui KE;Zhanhui WANG;Yi YU;Min XU(Southwestern Institute of Physics,Chengdu 610041,People's Republic of China;University of Science and Technology of China,Hefei 230026,People's Republic of China;Department of Applied Physics,Ghent University,9000 Ghent.Belgium)