Impacts of neon injection position and direction on toroidally asymmetric heat load distribution for EAST tokamak

B. Liu; S.Y. Dai; G. Kawamura; L. Zhang; Z.S. Yang; G.J. Niu; Y. Feng; D.Z. Wang

Nuclear Materials and Energy (Mar 2023)

Impacts of neon injection position and direction on toroidally asymmetric heat load distribution for EAST tokamak

B. Liu,
S.Y. Dai,
G. Kawamura,
L. Zhang,
Z.S. Yang,
G.J. Niu,
Y. Feng,
D.Z. Wang

Affiliations

B. Liu: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, China
S.Y. Dai: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, China; Corresponding author.
G. Kawamura: National Institute for Fusion Science, National Institutes of Natural Sciences, Toki 509-5292, Japan; Department of Fusion Science, the Graduate University for Advanced Studies, SOKENDAI, Toki 509-5292, Japan
L. Zhang: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
Z.S. Yang: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
G.J. Niu: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
Y. Feng: Max-Planck-Institut für Plasmaphysik, D-17491 Greifswald, Germany
D.Z. Wang: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, China

Journal volume & issue: Vol. 34
p. 101321

Abstract

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The impacts of neon injection positions and directions on the toroidally asymmetric heat load distributions on the divertor targets have been investigated for EAST tokamak by means of three-dimensional (3D) edge transport code EMC3-EIRENE. The heat loads on the outboard divertor targets are studied with five neon injection positions near the outboard strike point, which have different distances to separatrix. In comparison with neon injections away from the separatrix, neon injection close to the separatrix (within ∼ 1.2 cm) can lead to the asymmetric heat load profile on the outboard divertor targets. Furthermore, a parameter study of poloidal angle of neon injection has been conducted to estimate the effect of impurity injection direction on the suppression of heat loads. It is found that neon injection direction parallel to the magnetic surface results in the more effective mitigation of heat loads compared with other injection directions. Moreover, the neon accumulations in the core region are discussed for different neon injection positions and directions.

Published in Nuclear Materials and Energy

ISSN: 2352-1791 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Nuclear engineering. Atomic power
Website: http://www.journals.elsevier.com/nuclear-materials-and-energy/

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