Impurity emissivity tomographic reconstruction by CCD imaging system on J-TEXT
ID：30
Submission ID：61 View Protection：ATTENDEE
Updated Time：2023-11-20 13:45:34 Hits：560
Oral Presentation
Start Time：2023-12-10 11:00 （Asia/Shanghai）
Duration：15min
Session：[S10] Electric Machine Design and control » [S10] Electric Machine Design and control
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Abstract
A tomographic reconstruction scheme of the tangential CCD imaging system was developed on J-TEXT, and the 2-D emissivity profile of CIII was obtained. Tomographic reconstruction was performed on the hypothesis that the emissivity is toroidally symmetric. Calibration of the CCD imaging system was completed by direct linear transfer(DLT), and the line-of-sight equations corresponding to each detector of the imaging system were obtained. The 2-D poloidal emissivity profile of CIII in the divertor configuration is obtained through Tikhonov regularization. The results of tomographic reconstruction show the evolution process of CIII emissivity in the divertor experiment and fit well with the magnetic flux surface calculated by equilibrium fitting code(EFIT).
Keywords
CCD camera,Tikhonov regularization,tomographic reconstruction,J-TEXT
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