Modelling the capacitance of the elongated plasma in tokamak
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Published:2023-12-06
Issue:1
Volume:13
Page:
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ISSN:2045-2322
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Container-title:Scientific Reports
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language:en
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Short-container-title:Sci Rep
Author:
Miao Pengcheng,Li Ge,Zhang Song,Weng Zhiyuan,Wu Yu,Duan Zemin
Abstract
AbstractThe capacitance model suitable for the non-circular cross-section plasma is studied based on the capacitance model of the circular cross-section plasma. The coaxial elliptic-torus capacitor property is further derived and used to determine the capacity of non-circular cross-section tokamak plasma, such as EAST (Experimental Advanced Superconducting Tokamak). By testing all the physical terms in this model, we find that the capacitance $$Cp$$
Cp
) is increasing exponentially with the increase of elongation ratio (k2/k1), while the minor radius ratio (a2/a1) is just reversed at the flat-top of plasma current, and the capacitance property is implicitly included in the H-mode study during the L–H transition. It is noted that Cp-H mode is the least and Cp-I mode is approximately equal to Cp-L mode under the L-mode, I-mode and H-mode regimes based on this capacitance model in EAST. Consequently, it may be integrated into an equivalent circuit of the tokamak transformer or transport computer code of the edge plasma for use in precise simulations of fusion plasma behavior in the future, such as ITER (International Tokamak Experimental Reactor) or BEST (Burning-plasma Experimental Superconducting Tokamak) in China.
Funder
Research projects of postdoctoral researchers in Anhui Province, China
Startup Project of Doctor Scientific Research of China West Normal University in Sichuan Province, China
Key Program of Anhui Province Key Laboratory of Aircraft Lightning Protection, China
Publisher
Springer Science and Business Media LLC
Subject
Multidisciplinary
Reference18 articles.
1. Teller, E. Fusion, Magnetic Confinement, Part B (Elsevier, 1981).
2. Wesson, J. & Campbell, D. J. Tokamaks (Oxford University Press, 2004).
3. Houlberg, W. A. Volt second consumption in tokamaks with sawtooth activity. Nucl. Fusion 27, 1009–1019 (1987).
4. Wesson, J. Tokamaks 4th edn. (Oxford University Press, 2011).
5. Freidberg, J. P. Plasma Physics and Fusion Energy (Cambridge University Press, 2007).