Relative calibration and experimental results of ECEI near q=1 surface on J-TEXT
ID：27
Submission ID：58 View Protection：ATTENDEE
Updated Time：2023-11-20 13:45:34 Hits：251
Oral Presentation
Start Time：2023-12-10 10:00 （Asia/Shanghai）
Duration：15min
Session：[S10] Electric Machine Design and control » [S10] Electric Machine Design and control
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Abstract
Electron cyclotron emission imaging (ECEI) is widely utilized for measuring temperature perturbations in tokamaks. ECEI measurements are typically processed by normalizing fluctuations relative to the mean time-period signal. However, measuring phenomena with low temperature disturbance proves challenging and requires calibration to obtain static or low-disturbance magnetohydrodynamic (MHD) phenomena. This paper employs the hypothesis of temperature flattening during sawtooth collapse, along with two-dimensional rotation matching with GS displacement and a linear extrapolation method, to perform relative calibration of the ECEI channel. This paper reconstructed a two-dimensional image of the relative calibrated electron temperature and subsequently analyze the experimental phenomenon.
Keywords
Electron cyclotron emission imaging (ECEI);,Sawtooth;,Relative calibration.
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