Simulation of helium supersonic molecular beam injection in tokamak plasma

doi:10.1088/1674-1056/ab81fd

Abstract

To study helium (He) supersonic molecular beam injection (SMBI) into H-mode tokamak plasma, a simplified multicomponent-plasma model under the assumption of quasi-neutral condition is developed and implemented in the frame of BOUT ++. The simulation results show that He species propagate inwards after He SMBI, and are deposited at the bottom of the pedestal due to intensive ionization and weak spreading speed. It is found that almost all injected helium particles strip off all the bounded electrons. He species interact intensively with background plasma along the injection path during He SMBI, making deuterium ion density profile drop at the He-deposited location and resulting in a large electron temperature decreasing, but deuterium ion temperature decreasing a little at the top of the pedestal.

Keywords: SMBI simulation neutral transport helium transport H-mode plasma

Received: 23 December 2019
Revised: 18 February 2020
Accepted manuscript online:

PACS:	52.25.Fi	(Transport properties)
	52.25.Ya	(Neutrals in plasmas)

Fund:

Project supported by the Chunhui Program of the Ministry of Education of China (Grant No. Z2017091), the Sichuan Provincial Science Foundation for Distinguished Young Leaders of Disciplines in Science and Technology, China (Grant Nos. 2019JDJQ0051 and 2019JDJQ0050), the National Natural Science Foundation of China (Grant Nos. 11575055 and 11605143), the Fund for Young Scientists of China, the Open Research Subjects of the Key Laboratory of Advanced Computation in Xihua University, China (Grant Nos. szjj2017-011 and szjj2017-012), and the Young Scholarship Plan of Xihua University, China (Grant No. 0220170201).

Corresponding Authors: Zhan-Hui Wang, Hui-Dong Li
E-mail: zhwang@swip.ac.cn;huidongli@mail.xhu.edu.cn

Cite this article:

Xue-Ke Wu(吴雪科), Zhan-Hui Wang(王占辉), Hui-Dong Li(李会东), Li-Ming Shi(石黎铭), Di Wan(万迪), Qun-Chao Fan(樊群超), Min Xu(许敏) Simulation of helium supersonic molecular beam injection in tokamak plasma 2020 Chin. Phys. B 29 065201

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Simulation of helium supersonic molecular beam injection in tokamak plasma

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