Elucidation of spatiotemporal behavior of ionization front and its effect in detached plasmas
Project/Area Number |
16H06139
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Research Category |
Grant-in-Aid for Young Scientists (A)
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Allocation Type | Single-year Grants |
Research Field |
Nuclear fusion studies
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Research Institution | Nagoya University |
Principal Investigator |
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Project Period (FY) |
2016-04-01 – 2020-03-31
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Project Status |
Completed (Fiscal Year 2019)
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Budget Amount *help |
¥19,110,000 (Direct Cost: ¥14,700,000、Indirect Cost: ¥4,410,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2016: ¥13,260,000 (Direct Cost: ¥10,200,000、Indirect Cost: ¥3,060,000)
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Keywords | 非拡散的輸送 / 非接触プラズマ / 時空間構造 / 揺動解析 / 再結合フロント / 電離フロント / 装置間比較 |
Outline of Final Research Achievements |
The non-diffusive transport phenomenon enhanced in detached plasmas was complementarily investigated by using three plasma devices (NAGDIS-II, GAMMA 10/PDX, and LHD) with different magnetic geometries and the numerical simulation code (EMC3-EIRENE). Especially in NAGDIS-II, we clarified the relationship between the spatiotemporal behavior of the recombination front and the generation of the non-diffusive transport, and obtained results were compared with other devices. From the findings such that the enhanced transport is localized in the highly recombining region, the radial flow of neutral particles generated by the recombination processes has been suggested as a possible cause of the enhanced transport.
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Academic Significance and Societal Importance of the Research Achievements |
磁場閉じ込め核融合発電実現に向けた重要課題であるダイバータ熱負荷低減について、そのシミュレーション精度を向上させるための輸送増大現象の理解を進展させた。磁力線方向の局在性と再結合フロント位置との関係性から、物理機構の候補を提案し、また非一様輸送係数の導入といった高精度化への道筋を得た。今後研究が進展し、仮に輸送増大を外部制御可能な場合には、熱負荷をダイバータ板前面で任意に広く分散させることで、炉の熱的成立性を高め、発電炉の建設コストを大幅に低減できる可能性を有している。
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Report
(5 results)
Research Products
(71 results)
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[Journal Article] Spatiotemporal Structure of Hα Emission from the Detached Plasma in GAMMA 10/PDX2019
Author(s)
H. Tanaka, M. Sakamoto, N. Ezumi, A. Terakado, K. Nojiri, T. Mikami, Y. Kinoshita, K. Kobayashi, M. Yoshikawa, J. Kohagura, and N. Ohno
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Journal Title
Plasma and Fusion Research
Volume: 14
Issue: 0
Pages: 2402036-2402036
DOI
NAID
ISSN
1880-6821
Year and Date
2019-02-12
Related Report
Peer Reviewed / Open Access
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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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[Presentation] Upgrading of dc discharge system and diagnostics for plasma detachment study in linear plasma device NAGDIS-II2019
Author(s)
N. Ohno, N. Ezumi, Y. Hayashi, S. Kajita, H. Tanaka, H. Takano, M. Takagi, S. Masuzaki, M. Aramaki, M. Yoshikawa, H.J. van der Meiden
Organizer
7th International Workshop on Plasma Material Interactin Facilities for Fusion Research (PMIF 2019)
Related Report
Int'l Joint Research
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[Presentation] Analysis of multipoint fluctuations in the transient discharge from attached to detached states in GAMMA 10/PDX2018
Author(s)
H. Tanaka, M. Sakamoto, N. Ezumi, K. Nojiri, A. Terakado, T. Mikami, Y. Kinoshita, K. Kobayashi, M. Yoshikawa, J. Kohagura, and N. Ohno
Organizer
12th International Conference on Open Magnetic Systems for Plasma Confinement (OS2018)
Related Report
Int'l Joint Research
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[Presentation] LHDにおけるネオン・窒素入射によるトロイダル対称・非対称なダイバータフラックス低減効果2016
Author(s)
田中宏彦, 河村学思, 増崎貴, 小林政弘, B.J. Peterson, 向井清史, S. Dai, 秋山毅志, 坂本隆一, 森崎友宏, 大野哲靖, LHD実験グループ
Organizer
第33回プラズマ・核融合学会年会
Related Report
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[Presentation] Impacts of N2 and Ne seeding on the divertor particle and heat loads in LHD2016
Author(s)
H. Tanaka, S. Masuzaki, G. Kawamura, T. Akiyama, M. Kobayashi, B.J. Peterson, K. Mukai, R. Sano, S.N. Pandya, S. Dai, R. Sakamoto, T. Morisaki, N. Ohno, the LHD Experiment Group
Organizer
22nd International Conference on Plasma Surface Interactions (PSI) 2016
Related Report
Int'l Joint Research
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