Dependence of the internal inductance on the radial distance between the primary and secondary X-point surfaces in the EAST tokamak

Qi WANG (汪启); Qingquan YANG (杨清泉); Zhengmao SHENG (盛正卯); Guosheng XU (徐国盛); Jinping QIAN (钱金平); Ning YAN (颜宁); Yifeng WANG (王一丰); Heng ZHANG (张恒)

doi:10.1088/2058-6272/aad326

Plasma Science and Technology > 2018 > 20(10): 105101. > DOI: 10.1088/2058-6272/aad326

Qi WANG (汪启), Qingquan YANG (杨清泉), Zhengmao SHENG (盛正卯), Guosheng XU (徐国盛), Jinping QIAN (钱金平), Ning YAN (颜宁), Yifeng WANG (王一丰), Heng ZHANG (张恒). Dependence of the internal inductance on the radial distance between the primary and secondary X-point surfaces in the EAST tokamak[J]. Plasma Science and Technology, 2018, 20(10): 105101. DOI: 10.1088/2058-6272/aad326

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Dependence of the internal inductance on the radial distance between the primary and secondary X-point surfaces in the EAST tokamak

¹ Institute for Fusion Theory and Simulation, Department of Physics, Zhejiang University, Hangzhou 310027, People’s Republic of China
² Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
³ Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230031, People’s Republic of China
⁴ School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, People’s Republic of China

Funds: This work was supported by the National Magnetic Confinement Fusion Research Program of China under Grant Nos. 2013GB104004, 2015GB101000, and 2013GB107003, National Natural Science Foundation of China under Grant Nos. 11235009, 11475147, 11422546, 11575235, and 11575236, Fundamental Research Fund for Chinese Central Universities under Grant No. 2018FZA3004.

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Received Date: June 03, 2018

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Abstract

Abstract

In view of their advantage in long-pulse high-performance operations, low internal inductance scenarios are being developed and tested for the EAST and other tokamaks. Dependence of the internal inductance on several main plasma configuration parameters are statistically analyzed. It is found that the internal inductance of the plasma is closely related to the radial distance dR_sep between the primary and secondary X-point surfaces on the outer mid-plane as well as the poloidal field of the last closed flux surface. Moreover, dR_sepis also related to the distribution of the fast electrons driven by the injected lower-hybrid waves, which is partially responsible for the observed relation between dR_sepand the internal inductance. The results here should therefore be helpful as a guide for future experiments on internal inductance control and long-pulse operations of the EAST and other tokamaks, as well as for detailed theoretical study of the underlying physics.
- internal inductance,
- dR_sep,
- EAST tokamak

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References (17)

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