Coupling circuit model and discharge waveform prediction for Keda Torus eXperiment

•A coupling circuit model has been successfully developed for Keda Torus eXperiment to predict discharge waveforms.•The multigroup poloidal and toroidal winding circuits are adopt in the coupling model.•The delay effect due to resistive vacuum vessel is considered in the coupling model.•The results...

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Bibliographic Details
Published in:	Fusion engineering and design Vol. 100; pp. 495 - 500
Main Authors:	Bai, Wei, Lan, Tao, Yang, Lei, Xiao, Chijin, Mao, Wenzhe, You, Wei, Li, Chenguang, Tu, Cui, Tan, Mingsheng, Luo, Bin, Fu, Chengshuo, Huang, Fangchen, Xu, Hangqi, Deng, Tijian, Zhu, Junfeng, Fu, Peng, Wen, Xiaohui, Zhou, Haiyang, Wang, Hai, Wan, Shude, Liu, Ahdi, Xie, Jinlin, Li, Hong, Ding, Weixing, Liu, Wandong
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-11-2015
Subjects:	Coupling circuit Coupling circuits Design engineering Discharge Magnetic fields Mathematical models Plasma currents Power supplies Reversed field pinch Taylor's state Waveforms Reversed field pinch Coupling circuit Taylor's state
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Summary:	•A coupling circuit model has been successfully developed for Keda Torus eXperiment to predict discharge waveforms.•The multigroup poloidal and toroidal winding circuits are adopt in the coupling model.•The delay effect due to resistive vacuum vessel is considered in the coupling model.•The results shows the design of power supply system is capable of achieving the expected discharge waveforms. A poloidal and toroidal magnetic field coupling circuit model is developed to simulate discharge waveforms of the Keda Torus eXperiment (KTX) reversed field pinch (RFP) to ensure that the design of the power supply systems is able to achieve the typical discharge parameters. The radial profiles of plasma current density and magnetic field used in the coupling model are characterized by modified Bessel function model (MBFM) derived from the well-known Taylor's theory. The power balance in the energy conservation of poloidal and toroidal fields is used to establish the connection between these two fields. The numerical solutions of the coupling show that the KTX power supply system is capable of achieving the designed discharge parameters, such as field reversal parameter (F), pinch parameter (Θ), magnetic field, plasma current and loop voltage. Furthermore, the delay of magnetic field penetration due to the effect of vacuum vessel is also considered in the model.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0920-3796 1873-7196
DOI:	10.1016/j.fusengdes.2015.07.025