Modeling the toroidal asymmetry of the heat load impacted by nitrogen injection in EAST using EMC3-EIRENE
Luo,Yang1; Liu,Haifeng1; Xu,Yuhong1; Feng,Yuhe2; Guo,Wenfeng3; Dong,Chunfeng4; Wang,Xianqu1; Huang,Jie1; Liu,Hai1; Zhang,Xin1; Li,Wei1; Yang,Lang1; Li,Yangbo1; Liu,Jinmao1; Cheng,Jun1; Tang,Changjian5
Source PublicationPlasma Physics and Controlled Fusion
Corresponding AuthorLiu,Haifeng() ; Xu,Yuhong()
AbstractAbstractThe effects of nitrogen injection on the heat load in the scape-off layer are systematically investigated in the EAST double-null divertor configuration using EMC3-EIRENE code. Nitrogen impurities injected near the separatrix line and away from the separatrix line give rise to a non-axisymmetric distribution of heat load on the target plate. With impurity injection near the separatrix line, the occurrence of the toroidal asymmetric heat load is observed only nearby the toroidal injection location, while with injection away from the separatrix line the regions of the asymmetric heat load extend and deviate from the toroidal injection position. The competition between the friction force and the ion temperature gradient force has been analyzed. It shows that when impurities are injected away from the separatrix line more impurities can be parallelly transported to a further toroidal location, which results in the extension and deviation of the non-symmetric electron temperature. When the input power is increased, the non-symmetric phenomenon of the heat load turns to be insignificant due to the reduction of the impurity density in the downstream regions, as illustrated by the field line tracing technique. Furthermore, by scanning various injection positions in the EAST tokamak, the optimum location of impurity injection has been discovered.
KeywordEMC3-EIRENE simulation SOL gas puffing heat deposition
WOS IDIOP:0741-3335-63-10-ac138e
PublisherIOP Publishing
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Document Type期刊论文
Corresponding AuthorLiu,Haifeng; Xu,Yuhong
Affiliation1.Institute of Fusion Science, School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, People’s Republic of China
2.Max-Planck-Institute für Plasmaphysik, Association EURATOM-IPP, Greifswald 17491, Germany
3.Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
4.Southwestern Institute of Physics, PO Box 432, Chengdu 610041, People’s Republic of China
5.School of Physical Science and Technology, Sichuan University, Chengdu 610065, People’s Republic of China
Recommended Citation
GB/T 7714
Luo,Yang,Liu,Haifeng,Xu,Yuhong,et al. Modeling the toroidal asymmetry of the heat load impacted by nitrogen injection in EAST using EMC3-EIRENE[J]. Plasma Physics and Controlled Fusion,2021,63.
APA Luo,Yang.,Liu,Haifeng.,Xu,Yuhong.,Feng,Yuhe.,Guo,Wenfeng.,...&Tang,Changjian.(2021).Modeling the toroidal asymmetry of the heat load impacted by nitrogen injection in EAST using EMC3-EIRENE.Plasma Physics and Controlled Fusion,63.
MLA Luo,Yang,et al."Modeling the toroidal asymmetry of the heat load impacted by nitrogen injection in EAST using EMC3-EIRENE".Plasma Physics and Controlled Fusion 63(2021).
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