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Estimation of carbon impurity from the guard limiter of the lower hybrid wave antenna on EAST tokamak
Ou, Jing1,2; Xiang, Nong1,2; Liu, Liang1; Men, Zongzheng1; Zhang, Ling1; Mao, Songtao1; Chen, Meiwen1
2018-12-01
Source PublicationPLASMA PHYSICS AND CONTROLLED FUSION
ISSN0741-3335
Volume60Issue:12Pages:11
Corresponding AuthorOu, Jing(ouj@ipp.ac.cn)
AbstractHot spots on the EAST tokamak graphite guard limiters of the lower hybrid wave (LHW) antenna may cause a sudden increase of impurity influx and even ending with disruption. A sheath model is developed by taking into account the energetic electron component from the plasma-LHW interaction via electron Landau damping, and then a self-consistent method is used to study the interaction of the plasma across the sheath at the material surface and material thermal response. It is found that the fast electron fluxes driven by both the 2.45 and 4.6 GHz LHWs modify strongly the sheath potential, which then influence on the bombarding ion energy at the material surface and the surface temperature. By calculating the carbon physical sputtering and chemical erosion from guard limiter of the LHW antenna, the carbon production from the guard limiter in two LHW systems is found to have different behavior for the same edge plasma density and electron temperature. Our results show that carbon impurity is mainly from physical sputtering, except for the 4.6 GHz LHW in a narrow range of the high electron temperature where the chemical erosion has a very sharp increase. Due to modification of the sheath potential induced by the fast electrons, the power density is higher with the 4.6 GHz than the 2.45 GHz LHW system. As a consequence the surface temperature is higher at 4.6 GHz and susceptible to reach several hundred of degrees which is prone to chemical erosion.
Keywordphysical sputtering chemical erosion hot spot plasma sheath
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; AHNFS ; AHNFS ; AHNFS ; AHNFS ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; AHNFS ; AHNFS ; AHNFS ; AHNFS ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; AHNFS ; AHNFS ; AHNFS ; AHNFS ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; AHNFS ; AHNFS ; AHNFS ; AHNFS
DOI10.1088/1361-6587/aae81e
WOS KeywordPRIMARY ELECTRONS ; CHEMICAL EROSION ; FUSION DEVICES ; PLASMA ; DEPOSITION ; ASYMMETRIES ; DIVERTOR ; UPGRADE ; ASDEX ; YIELD
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2017YFE0300400] ; National Natural Science Foundation of China[11475223] ; National Natural Science Foundation of China[11775257] ; National Magnetic Confinement Fusion Science Program of China[2015GB101003] ; AHNFS[1808085J0]
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; AHNFS ; AHNFS ; AHNFS ; AHNFS ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; AHNFS ; AHNFS ; AHNFS ; AHNFS ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; AHNFS ; AHNFS ; AHNFS ; AHNFS ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; National Magnetic Confinement Fusion Science Program of China ; AHNFS ; AHNFS ; AHNFS ; AHNFS
WOS Research AreaPhysics
WOS SubjectPhysics, Fluids & Plasmas
WOS IDWOS:000449418100002
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.hfcas.ac.cn:8080/handle/334002/34477
Collection中科院等离子体物理研究所
Corresponding AuthorOu, Jing
Affiliation1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China
2.Chinese Acad Sci, Magnet Fus Theory, Hefei 230031, Anhui, Peoples R China
Recommended Citation
GB/T 7714
Ou, Jing,Xiang, Nong,Liu, Liang,et al. Estimation of carbon impurity from the guard limiter of the lower hybrid wave antenna on EAST tokamak[J]. PLASMA PHYSICS AND CONTROLLED FUSION,2018,60(12):11.
APA Ou, Jing.,Xiang, Nong.,Liu, Liang.,Men, Zongzheng.,Zhang, Ling.,...&Chen, Meiwen.(2018).Estimation of carbon impurity from the guard limiter of the lower hybrid wave antenna on EAST tokamak.PLASMA PHYSICS AND CONTROLLED FUSION,60(12),11.
MLA Ou, Jing,et al."Estimation of carbon impurity from the guard limiter of the lower hybrid wave antenna on EAST tokamak".PLASMA PHYSICS AND CONTROLLED FUSION 60.12(2018):11.
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