Effects of helium massive gas injection level on disruption mitigation on EAST

Abdullah ZAFAR; Ping ZHU; Ahmad ALI; Shiyong ZENG (曾市勇); Haolong LI (李浩龙)

doi:10.1088/2058-6272/abfea3

Plasma Science and Technology > 2021 > 23(7): 75103-075103. > DOI: 10.1088/2058-6272/abfea3

Abdullah ZAFAR, Ping ZHU, Ahmad ALI, Shiyong ZENG (曾市勇), Haolong LI (李浩龙). Effects of helium massive gas injection level on disruption mitigation on EAST[J]. Plasma Science and Technology, 2021, 23(7): 75103-075103. DOI: 10.1088/2058-6272/abfea3

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Effects of helium massive gas injection level on disruption mitigation on EAST

¹ CAS Key Laboratory of Geospace Environment and Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei 230026, People's Republic of China
² International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
³ Department of Engineering Physics, University of Wisconsin-Madison, Madison, WI 53706, United States of America
⁴ Pakistan Tokamak Plasma Research Institute, Islamabad 3329, Pakistan
⁵ Department of Plasma Physics and Fusion Engineering, University of Science and Technology of China, Hefei 230026, People's Republic of China

Funds: his research was supported by the National Magnetic Confinement Fusion Science Program of China (No. 2019YFE03050004), National Natural Science Foundation of China (Nos. 11775221 and 51821005), US DOE (Nos. DE-FG02-86ER53218 and DESC0018001), and the Fundamental Research Funds for the Central Universities at Huazhong University of Science and Technology (No. 2019kfyXJJS193).

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Received Date: February 21, 2021
Revised Date: May 04, 2021
Accepted Date: May 05, 2021

Graphical Abstract

Abstract

Abstract

In this study, NIMROD simulations are performed to investigate the effects of massive helium gas injection level on the induced disruption on EAST tokamak. It is demonstrated in simulations that two different scenarios of plasma cooling (complete cooling and partial cooling) take place for different amounts of injected impurities. For the impurity injection above a critical level, a single MHD activity is able to induce a complete core temperature collapse. For impurity injection below the critical level, a series of multiple minor disruptions occur before the complete thermal quench.
- massive gas injection,
- MHD instabilities,
- major disruption,
- minor disruption

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References (36)

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