In situ relative self-dependent calibration of electron cyclotron emission imaging via shape matching

Dongqi Han; Jinlin Xie; Azam Hussain; Bingxi Gao; Chengming Qu; Wang Liao; Xinhang Xu; Feixue Gao; Hong Li; Tao Lan; Adi Liu; Ge Zhuang; Wandong Liu

doi:10.1063/1.5038866

In situ relative self-dependent calibration of electron cyclotron emission imaging via shape matching

Rev Sci Instrum. 2018 Oct;89(10):10H119. doi: 10.1063/1.5038866.

Authors

Dongqi Han¹, Jinlin Xie¹, Azam Hussain¹, Bingxi Gao¹, Chengming Qu¹, Wang Liao¹, Xinhang Xu¹, Feixue Gao¹, Hong Li¹, Tao Lan¹, Adi Liu¹, Ge Zhuang¹, Wandong Liu¹

Affiliation

¹ School of Physical Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China.

PMID: 30399952
DOI: 10.1063/1.5038866

Abstract

Electron Cyclotron Emission Imaging (ECEI) is a diagnostic system which measures 2-D electron temperature profiles with high spatial-temporal resolution. Usually only the normalized electron temperature fluctuations are utilized to investigate the magnetohydrodynamics modes due to the difficulties of ECEI calibration. In this paper, we developed a self-dependent calibration method for 24 × 16 channel high-resolution ECEI on the Experimental Advanced Superconducting Tokamak. The technique of shape matching is applied to solve for the matrix of the calibration coefficients. The calibrated area is further expanded to an occupation ratio of 88% observation area by utilizing the features of sawtooth crash. The result is self-consistent and consistent with calibrated 1D ECE measurement.