3D effects of magnetic topology on edge plasma radiation enhancement and divertor power load reduction
Project/Area Number |
16H04622
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Nuclear fusion studies
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Research Institution | National Institute for Fusion Science |
Principal Investigator |
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Research Collaborator |
Masuzaki Suguru
Morita Shigeru
Dai Shuyu
Oishi Tetsutarou
Kuzmin Arseniy
Kobayashi Taisuke
Kawamura Gakushi
Zhang Hongming
Mukai Kiyohumi
Schmitz Oliver
Bader Aaron
Feng Yuehe
Ahn Joon-Wook
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Project Period (FY) |
2016-04-01 – 2019-03-31
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Project Status |
Completed (Fiscal Year 2018)
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Budget Amount *help |
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2016: ¥13,390,000 (Direct Cost: ¥10,300,000、Indirect Cost: ¥3,090,000)
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Keywords | 核融合 / ダイバータ / 放射 / 3次元効果 / 磁力線構造 / 3次元不純物発光分布 / 放射冷却 / 不純物輸送 / 3次元磁場効果 / プラズマ核融合 / 不純物発光・輸送 / プラズマ・核融合 / 不純物発光 / トポロジー |
Outline of Final Research Achievements |
In a magnetically confined nuclear fusion reactor, the excessive heat load on the plasma facing component (PFC) is a crucial issue. In order to mitigate the heat load, radiation cooling of edge plasma is considered as a possible scheme. We have investigated the impact of 3D edge magnetic field structure on the radiation cooling. It has been found that, the application of external magnetic perturbation field enhances radiation cooling from impurity ions of lower charge states, the enhanced radiation region is located outside of the confinement region, the total heat load on the PFC decreases, but there appears an increased region locally, and that the amount of radiation cooling is independent of the strength of the perturbation field. It is also found that the current transport model of plasma has to be improved in order to reproduce the experimental results.
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Academic Significance and Societal Importance of the Research Achievements |
本研究の成果から、磁場閉じ込め型核融合炉における装置壁への過剰な熱負荷を、周辺磁場を変化させることによって制御できることが明らかになった。また、磁化プラズマ中における燃料粒子と不純物粒子の相互作用(原子・分子過程)に起因する放射損失過程によって、プラズマの熱エネルギーが電磁波として放出されること、またそれにともなうエネルギー輸送過程の理解が深った。現状の数値シミュレーションで広く用いられているプラズマ輸送モデルの改善点が明らかになった。
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Report
(4 results)
Research Products
(59 results)
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[Journal Article] Toroidally symmetric/asymmetric effect on the divertor flux due to neon/nitrogen seeding in LHD2017
Author(s)
Tanaka H., Kawamura G., Masuzaki S., Kobayashi M., Akiyama T., Peterson B.J., Mukai K., Sano R., Dai S.Y., Sakamoto R., Morisaki T., Ohno N.
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Journal Title
Nuclear Materials and Energy
Volume: 12
Pages: 241-246
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] A comprehensive study on impurity behavior in LHD long pulse discharges2017
Author(s)
Y. Nakamura, N. Tamura, M. Kobayashi, S. Yoshimura, C. Suzuki, M. Yoshinuma, M. Goto, G. Motojima, K. Nagaoka, K. Tanaka, R. Sakamoto, B.J. Peterson, K. Ida, M. Osakabe, T. Morisaki, the LHD Experiment Group
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Journal Title
Nuclear Material and Energy
Volume: 印刷中
Pages: 124-132
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Vertical profiles and two-dimensional distributions of carbon line emissions from C212C51 ions in attached and RMP-assisted detached plasmas of large helical device2016
Author(s)
Hongming Zhang, Shigeru Morita, Shuyu Dai, Tetsutarou Oishi, Motoshi Goto, Xianli Huang, Gakushi Kawamura, Masahiro Kobayashi, Yang Liu, Izumi Murakami, Yoshiro Narushima
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Journal Title
Physics of Plasmas
Volume: 24
Issue: 2
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Enhancement of helium exhaust by resonant magnetic perturbation fields at LHD and TEXTOR2016
Author(s)
O. Schmitz, K. Ida, M. Kobayashi, A. Bader, S. Brezinsek, T.E. Evans, H. Funaba, M. Goto, O. Mitarai, T. Morisaki, G. Motojima, Y. Nakamura, Y. Narushima, D. Nicolai, U. Samm, H. Tanaka, H. Yamada, M. Yoshinuma, Y. Xu and the TEXTOR and LHD Experiment Group
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Journal Title
Nuclear Fusion
Volume: 56
Issue: 10
Pages: 106011-106011
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Presentation] Core plasma transport during divertor detachment stabilized with RMP application in LHD2018
Author(s)
M. Kobayashi, S. Masuzaki, R. Seki, K. Tanaka, T. Tokuzawa, S. Morita, M. Yokoyama, T. Ido, Y. Narushima, I. Yamada, and the LHD Experimental group
Organizer
日本物理学会2018年秋季大会
Related Report
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[Presentation] CORE TRANSPORT IMPROVEMENT IN STABLE DETACHMENT WITH RMP APPLICATION TO THE EDGE STOCHASTIC LAYER OF LHD2018
Author(s)
M. Kobayashi, S. Masuzaki, R. Seki, K. Tanaka, T. Tokuzawa, S. Morita, M. Yokoyama, T. Ido, Y. Narushima, I. Yamada, and the LHD Experimental group
Organizer
27th IAEA Fusion Energy Conference - IAEA CN-258
Related Report
Int'l Joint Research
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[Presentation] Effects of stochastic magnetic field structure on edge impurity emission distribution in LHD2018
Author(s)
T. Kobayashi, M. Kobayashi, A. Kuzmin, M. Goto, H. Tanaka, G. Kawamura, T. Nakano, B. Peterson, N. Iwama, S. Morita, LHD experiment group
Organizer
Interna5onal Conference on Plasma-Surface Interac5ons in Controlled Fusion Devices
Related Report
Int'l Joint Research
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[Presentation] Comparison of 3D distribution of impurity emission obtained by single field-of-view tomography with 3D edge transport code EMC3-EIRENE in the large helical device2018
Author(s)
T. Kobayashi, M. Kobayashi, A. Kuzmin, M. Goto, H. Tanaka, G. Kawamura, T. Nakano, B. Peterson, N. Iwama, S. Morita, LHD experiment group
Organizer
The 27th International Toki Conference on Plasma and Fusion Research
Related Report
Int'l Joint Research
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[Presentation] LHDにおけるRMP磁場印加によって安定化されたデタッチメント運転とコアプラズマ輸送の関係2018
Author(s)
M. Kobayashi, S. Masuzaki, R. Seki, S. Morita, K. Tanaka, T. Tokuzawa, M. Yokoyama, T. Ido, Y. Narushima, I. Yamada, and the LHD Experimental group
Organizer
第35回 プラズマ・核融合学会 年会
Related Report
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[Presentation] "Effects of 3D edge magnetic field structure of the stochastic field on the divertor transport in LHD2017
Author(s)
M. Kobayashi, S. Morita, T. Oishi, K. Ida, K. Itoh, Y. Feng, Z.Y. Cui, S. Dai, G. Kawamura, O. Schmitz, A. Bader, and the LHD experiment group
Organizer
18th IEA International RFP Workshop
Place of Presentation
繊維工芸大学、京都市
Year and Date
2017-03-27
Related Report
Int'l Joint Research
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[Presentation] Edge transport and plasma-wall interactions on LHD2017
Author(s)
M. Kobayashi, T. Kobayashi, S. Masuzaki1, T. Oishi, S. Morita, B.J. Peterson, K. Mukai, C. Suzuki, H. Tanaka, G. Motojima, G. Kawamura, R. Sakamoto, T. Morisaki, and The LHD experiment group
Organizer
643rd Wilhelm and Else Heraeus Seminar on “Impact of 3D magnetic fields on hot plasmas”
Related Report
Int'l Joint Research / Invited
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[Presentation] Divertor detachment in LHD with edge stochastic layer and comparison with 3D numerical simulations2017
Author(s)
M. Kobayashi, T. Kobayashi, S. Masuzaki1, T. Oishi, S. Morita, B.J. Peterson, K. Mukai, C. Suzuki, H. Tanaka, G. Motojima, G. Kawamura, R. Sakamoto, T. Morisaki, and The LHD experiment group
Organizer
7th APTWG2017 International Conference
Related Report
Int'l Joint Research
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[Presentation] Development of spectroscopy system for study of edge impurity/hydrogen emission in relation to magnetic field structure and divertor power load distribution in LHD2017
Author(s)
M. Kobayashi T. Kobayashi, A. Kuzmin, S. Masuzaki, M. Hasuo, K. Fujii, T. Nakano, H. Tanaka, G. Kawamura, K. Sawada, S. Morita, M. Goto, T. Morisaki, and the LHD experiment group
Organizer
The 21st International Stellarator/Heliotron Workshop
Related Report
Int'l Joint Research
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[Presentation] Development of spectroscopy system for study of edge impurity emission and transport in relation to divertor power load distribution in LHD2017
Author(s)
M. Kobayashi T. Kobayashi, A. Kuzmin, S. Masuzaki, M. Hasuo, K. Fujii, T. Nakano, H. Tanaka, G. Kawamura, K. Sawada, S. Morita, M. Goto, T. Morisaki, and the LHD experiment group
Organizer
PlasmaConference2017
Related Report
Int'l Joint Research
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