Effects of some parameters on the divertor plasma sheath characteristics and fuel retention in castellated tungsten tile gaps

doi:10.1088/1674-1056/23/11/115201

中国物理B ›› 2014, Vol. 23 ›› Issue (11): 115201-115201.doi: 10.1088/1674-1056/23/11/115201

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇下一篇

Effects of some parameters on the divertor plasma sheath characteristics and fuel retention in castellated tungsten tile gaps

桑超峰^a, 戴舒宇^a, 孙继忠^a, Bonnin Xavier^b, 徐倩^c, 丁芳^c, 王德真^a

a Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics and Optoelectronic Engineering, Dalian University of Technology, Dalian 116024, China;
b LSPM-CNRS, Université Paris 13, Sorbonne Paris Cité, Villetaneuse 93430, France;
c Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

收稿日期:2014-03-01 修回日期:2013-04-01 出版日期:2014-11-15 发布日期:2014-11-15
基金资助:
Project supported by the National Magnetic Confinement Fusion Science Program, China (Grant No. 2013GB109001), the National Natural Science Foundation of China (Grant Nos. 11275042 and 11305026), and the Fundamental Research Funds for the Central Universities of Ministry of Education of China (Grant No. DUT14RC(3)039).

Effects of some parameters on the divertor plasma sheath characteristics and fuel retention in castellated tungsten tile gaps

Sang Chao-Feng (桑超峰)^a, Dai Shu-Yu (戴舒宇)^a, Sun Ji-Zhong (孙继忠)^a, Bonnin Xavier^b, Xu Qian (徐倩)^c, Ding Fang (丁芳)^c, Wang De-Zhen (王德真)^a

a Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics and Optoelectronic Engineering, Dalian University of Technology, Dalian 116024, China;
b LSPM-CNRS, Université Paris 13, Sorbonne Paris Cité, Villetaneuse 93430, France;
c Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

Received:2014-03-01 Revised:2013-04-01 Online:2014-11-15 Published:2014-11-15
Contact: Sang Chao-Feng, Wang De-Zhen E-mail:sang@dlut.edu.cn;wangdez@dlut.edu.cn
Supported by:
Project supported by the National Magnetic Confinement Fusion Science Program, China (Grant No. 2013GB109001), the National Natural Science Foundation of China (Grant Nos. 11275042 and 11305026), and the Fundamental Research Funds for the Central Universities of Ministry of Education of China (Grant No. DUT14RC(3)039).

摘要/Abstract

摘要：

Castellation of plasma facing components is foreseen as the best solution for ensuring the lifetime of future fusion devices. However, the gaps between the resulting surface elements can increase fuel retention and complicate fuel removal issues. To know how the fuel is retained inside the gaps, the plasma sheath around the gaps needs to be understood first. In this work, a kinetic model is used to study plasma characteristics around the divertor gaps with the focus on the H⁺ penetration depth inside the poloidal gaps, and a rate-theory model is coupled to simulate the hydrogen retention inside the tungsten gaps. By varying the magnetic field strength and plasma temperature, we find that the H⁺ cyclotron radius has a significant effect on the penetration depth. Besides, the increase of magnetic field inclination angle can also increase the penetration depth. It is found in this work that parameters as well as the penetration depth strongly affect fuel retention in tungsten gaps.

关键词: divertor gaps, penetration depth, plasma sheath, fuel retention

Abstract:

Key words: divertor gaps, penetration depth, plasma sheath, fuel retention

中图分类号: (Plasma sheaths)

52.40.Kh

52.55.Rk (Power exhaust; divertors) 52.65.Rr (Particle-in-cell method) 52.65.-y (Plasma simulation)

桑超峰, 戴舒宇, 孙继忠, Bonnin Xavier, 徐倩, 丁芳, 王德真. Effects of some parameters on the divertor plasma sheath characteristics and fuel retention in castellated tungsten tile gaps[J]. 中国物理B, 2014, 23(11): 115201-115201.

Sang Chao-Feng (桑超峰), Dai Shu-Yu (戴舒宇), Sun Ji-Zhong (孙继忠), Bonnin Xavier, Xu Qian (徐倩), Ding Fang (丁芳), Wang De-Zhen (王德真). Effects of some parameters on the divertor plasma sheath characteristics and fuel retention in castellated tungsten tile gaps[J]. Chin. Phys. B, 2014, 23(11): 115201-115201.

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Effects of some parameters on the divertor plasma sheath characteristics and fuel retention in castellated tungsten tile gaps

Effects of some parameters on the divertor plasma sheath characteristics and fuel retention in castellated tungsten tile gaps

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