Non-inductive formation of overdense spherical tokamak with EB wave in the first propagation band by Gaussian beams
Project/Area Number |
26249142
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Research Category |
Grant-in-Aid for Scientific Research (A)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Nuclear fusion studies
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Research Institution | Kyoto University |
Principal Investigator |
Tanaka Hitoshi 京都大学, エネルギー科学研究科, 教授 (90183863)
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Co-Investigator(Kenkyū-buntansha) |
前川 孝 京都大学, エネルギー科学研究科, 名誉教授 (20127137)
打田 正樹 京都大学, エネルギー科学研究科, 助教 (90322164)
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Project Period (FY) |
2014-06-27 – 2017-03-31
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Project Status |
Completed (Fiscal Year 2016)
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Budget Amount *help |
¥34,970,000 (Direct Cost: ¥26,900,000、Indirect Cost: ¥8,070,000)
Fiscal Year 2016: ¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
Fiscal Year 2015: ¥10,660,000 (Direct Cost: ¥8,200,000、Indirect Cost: ¥2,460,000)
Fiscal Year 2014: ¥14,950,000 (Direct Cost: ¥11,500,000、Indirect Cost: ¥3,450,000)
|
Keywords | 電子バーンスタイン波加熱・電流駆動 / オーバーデンスプラズマ / モード変換 / トカマクの無誘導形成 / 球状トカマク / 無誘導トカマク形成 / 電子サイクロトロン加熱・電流駆動 / 電子バーンスタイン波 / ECH/ECCD / 無誘導形成 |
Outline of Final Research Achievements |
When the 1st electron cyclotron resonance (ECR) layer is located at the plasma core, the 2nd harmonic ECR layer is near the outboard vessel wall, the upper hybrid resonance layer is located between them and the left-handed polarized electromagnetic wave is launched obliquely to the toroidal magnetic field from the outboard side of the torus, then, extremely overdense spherical tokamak plasmas are produced non-inductively with the electron density of ~6 times the plasma cutoff density. Injected electromagnetic wave is mode-converted to electrn Bernstein wave and absorbed along the propagation path firstly by high energy electrons at the Doppler-shifted ECR in the low field side, next by bulk electrons at the 1st ECR at the plasma center. Bulk electron temperature is increased at the plasma center, which results in the increase of the electron density. The degradation of heating and/or current drive by non-linear effects due to high power density is not observed with ~200kW injection.
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Report
(4 results)
Research Products
(36 results)
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[Journal Article] Non-inductive Production of Extremely Overdense Spherical Tokamak Plasma by Electron Bernstein Wave Excited via O-X-B Method in LATE2016
Author(s)
H. Tanaka, M. Uchida, T. Maekawa, K. Kuroda, Y. Nozawa, A. Yoshida, D. Watanabe, K. Takamatsu, A. Hoshino, D. Honda, T. Kawaharada
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Journal Title
Proceedings of 26th IAEA Fusion Energy Conference
Volume: IAEA-CN-234, EX/P4-45
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Presentation] Magnetic activity in an over-dense spherical tokamak plasma formed by electron Bernstein wave on LATE2017
Author(s)
R. Kajita, H. Tanaka, M. Uchida, Y. Nozawa, T. Kawaharada, K. Takamatsu, A. Hoshino, D. Honda, D. Watanabe, Y. Ohmura, Y. Sakai, H. Shirai
Organizer
5th A3 Foresight Workshop on Spherical Torus
Place of Presentation
Fontaine Blanche Hotel, Kunming, Yunnan, China
Year and Date
2017-02-15
Related Report
Int'l Joint Research
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[Presentation] Recent results on EBW experiments in LATE2017
Author(s)
H. Tanaka, M. Uchida, Y. Nozawa, T. Kawaharada, K. Takamatsu, A. Hoshino, D. Honda, D. Watanabe, Y. Omura, R. Kajita, Y. Sakai, H. Shirai, T. Maekawa
Organizer
The 5th Kyushu Workshop on Solenoid-Free RF-only ST Plasmas
Place of Presentation
Kyushu University, Kasuga, Fukuoka, Japan
Year and Date
2017-02-02
Related Report
Int'l Joint Research
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[Presentation] 電子バーンスタイン波のみで維持された球状トカマクプラズマの重イオンビームプローブによる空間電位分布の計測2016
Author(s)
本多大輝,白井玄佳,酒井陽介,打田正樹,田中仁,野澤嘉孝,河原田俊秀,高松恭平,星野新、渡辺大輔,大村侑司,梶田竜助,前川孝
Organizer
プラズマ・核融合学会第33回年会
Place of Presentation
東北大学青葉山キャンパス、仙台市、宮城県
Year and Date
2016-11-29
Related Report
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[Presentation] Non-inductive Start-up of Tokamaks by ECH/ECCD2015
Author(s)
H. Tanaka , M. Uchida and T. Maekawa
Organizer
Japan-Korea Workshop on "Physics and Technology of Heating and Current Drive"
Place of Presentation
Hitachi Civic Center, Hitachi-City, Ibaragi, Japan
Year and Date
2015-12-21
Related Report
Int'l Joint Research
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[Presentation] LATE 装置における 5GHz マイクロ波を用いた高磁場・短波長での電子バーンスタイン波による非誘導球状トカマク形成2015
Author(s)
田中仁, 野澤嘉孝, 吉田篤史, 河原田俊秀, 高松恭平, 星野新, 本多大輝, 渡辺大輔, 黒田賢剛, 打田正樹, 前川孝
Organizer
第32回プラズマ・核融合学会年会
Place of Presentation
名古屋大学東山キャンパス・豊田講堂、名古屋市、愛知県
Year and Date
2015-11-24
Related Report
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[Presentation] LATEでの電子バーンスタイン波加熱・電流駆動によるマイクロ波球状トカマク形成における高速電子の生成と損失2015
Author(s)
打田正樹, 野澤嘉孝, 吉田篤史, 河原田俊秀, 高松恭平, 星野新, 本多大輝, 渡辺大輔, 黒田賢剛, 田中仁, 前川孝
Organizer
第32回プラズマ・核融合学会年会
Place of Presentation
名古屋大学東山キャンパス・豊田講堂、名古屋市、愛知県
Year and Date
2015-11-24
Related Report
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[Presentation] LATE での電子バーンスタイン波を用いた非誘導球状トカマク形成時の入射波偏波制御2015
Author(s)
野澤嘉孝, 打田正樹, 田中仁, 高松恭平, 吉田篤史, 渡辺大輔, 河原田俊秀, 星野新, 本多大輝, 黒田賢剛, 前川孝
Organizer
第32回プラズマ・核融合学会年会
Place of Presentation
名古屋大学東山キャンパス・豊田講堂、名古屋市、愛知県
Year and Date
2015-11-24
Related Report
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[Presentation] Recent results on non-inductive formation of spherical torus by electron Bernstein wave heating and current drive in LATE2015
Author(s)
H. Tanaka, Y. Nozawa, A. Yoshida, T. Kawaharada, K. Takamatsu, A. Hoshino, D. Honda, D. Watanabe, K. Kuroda, M. Uchida, T. Maekawa
Organizer
The 18th International Spherical Torus Workshop (ISTW-2015)
Place of Presentation
Princeton University, Princeton, USA
Year and Date
2015-11-03
Related Report
Int'l Joint Research
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[Presentation] Polarization control of incident microwave for non-inductive formation of spherical tokamak by electron Bernstein wave heating and current drive in LATE2015
Author(s)
Y. Nozawa, M. Uchida, H. Tanaka, K. Takamatsu, A. Yoshida, T. Kawaharada, A. Hoshino, D. Honda, D. Watanabe, K. Kuroda, T. Maekawa
Organizer
The 18th International Spherical Torus Workshop (ISTW-2015)
Place of Presentation
Princeton University, Princeton, USA
Year and Date
2015-11-03
Related Report
Int'l Joint Research
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[Presentation] Polarization Control during Non-Inductive Start-up by Electron Bernstein Wave Heating and Current Drive in LATE2015
Author(s)
H. Tanaka, Y. Nozawa, A. Yoshida, T. Kawaharada, K. Takamatsu, A. Hoshino, D. Honda, D. Watanabe, K. Kuroda, M. Uchida, T. Maekawa
Organizer
Workshop on RF Heating Technology of Fusion Plasmas 2015
Place of Presentation
KFC Hall, Sumida-ku, Tokyo, JAPAN
Year and Date
2015-08-31
Related Report
Int'l Joint Research
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