Study on the boundary condition of spontaneously excited Alfven wave and relaxation of anisotropy in a mirror magnetic field configuration

• Project/Area Number: 15K17797
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Plasma science
• Research Institution: University of Tsukuba
• Principal Investigator: IKEZOE Ryuya 筑波大学, 数理物質系, 助教 (70582849)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 波動計測 / マイクロ波反射計 / AIC波動 / ICRF加熱 / 高エネルギーイオン計測 / 温度非等方性 / スイッチングアンテナ / 波動粒子相互作用 / アルベンイオンサイクロトロン波動 / ICRF波動 / ミラー磁場 / 非線形波動結合

Outline of Final Research Achievements

Alfven ion cyclotron wave is excited due to strong anisotropy of ion temperature, which is generated by ICRF heating in the GAMMA 10 tandem mirror device. Multiple AIC waves are simultaneously excited in an unstable frequency band as discrete peaks, of which spatial structure has been investigated by developing a two-channel microwave reflectometer with fast antenna switching. The radial profile, axial variation at five positions and phase profile of the density fluctuations accompanied by the AIC waves have been successfully measured along with those temporal evolution. A clear difference in the axial profile has been found among the AIC waves for the first time. In addition, it is indicated that the difference waves are generated by nonlinear coupling among the AIC waves, which contribute to the relaxation of temperature anisotropy.

Research Products

• [Journal Article] Measurement of ICRF wave propagation using a microwave reflectometer with fast antenna switching on GAMMA 10 (2017)
  • Author(s): R. Ikezoe, M. Ichimura, J. Itagaki, M. Hirata, S. Sumida, S. Jang, K. Izumi, A. Tanaka, R. Sekine, Y. Kubota, Y. Shima, J. Kohagura, M. Yoshikawa, M. Sakamoto and Y. Nakashima
  • Journal Title: Journal of Instrumentation Volume: 12 Issue: 12 Pages: C12017-C12017
  • DOI: 10.1088/1748-0221/12/12/c12017
  • Peer Reviewed
• [Journal Article] Multi-point measurement using two-channel reflectometer with antenna switching for study of high-frequency fluctuations in GAMMA 10 (2017)
  • Author(s): R. Ikezoe, M. Ichimura, T. Okada, J. Itagaki, M. Hirata, S. Sumida, S. Jang, K. Izumi, A. Tanaka, M. Yoshikawa, J. Kohagura, M. Sakamoto, and Y. Nakashima
  • Journal Title: Rev. Sci. Instrum. Volume: 88 Issue: 3 Pages: 033504-033504
  • DOI: 10.1063/1.4978323
  • NAID: 120007129202
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Development of internal ICRF wave detection using microwave reflectometry on GAMMA 10 (2016)
  • Author(s): R. Ikezoe, M. Ichimura, J. Itagaki, M. Hirata, S. Sumida, S. Jang, M. Yoshikawa, J. Kohagura, M. Sakamoto, and Y. Nakashima
  • Journal Title: AIP Conference Proceedings Volume: 1771 Pages: 050002-050002
  • DOI: 10.1063/1.4964196
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] ICRF heating in the plug/barrier region to control end-loss ions on GAMMA 10/PDX (2016)
  • Author(s): S. Jang, M. Ichimura, S. Sumida, M. Hirata, R. Ikezoe, M. Sakamoto, T. Okada, Y. Iwamoto, Y. Onodera, J. Itagaki, K. Ichimura, and Y. Nakashima
  • Journal Title: AIP Conference Proceedings Volume: 1771 Pages: 030011-030011
  • DOI: 10.1063/1.4964167
  • Peer Reviewed
• [Journal Article] Direct Observation of Electron Heating by Electron Landau Damping of Alfvén Ion Cyclotron Waves Using Thomson Scattering System in the Tandem Mirror GAMMA 10/PDX (2016)
  • Author(s): M. Yoshikawa, R. Ikezoe, K. Ohta, X. Wang, J. Kohagura, Y. Shima, M. Chikatsu, K. Ichimura, M. Sakamoto, M. Ichimura, T. Imai, R. Minami, K. Tsumura and Y. Nakashima
  • Journal Title: Plasma and Fusion Research Volume: 11 Issue: 0 Pages: 2402051-2402051
  • DOI: 10.1585/pfr.11.2402051
  • NAID: 130005395220
  • ISSN: 1880-6821
  • Peer Reviewed
• [Journal Article] Spatial Structure of Spontaneously Excited ICRF Waves and Relevant High-Energy Ion Loss in the GAMMA 10 Tandem Mirror (2016)
  • Author(s): R. Ikezoe, M. Ichimura, M. Hirata, T. Okada, S. Sumida, S. Jang, J. Itagaki, M. Yoshikawa, J. Kohagura, M. Sakamoto, Y. Nakashima
  • Journal Title: Proceedings of 26th IAEA-FEC Volume: -
  • Acknowledgement Compliant
• [Journal Article] Wave excitation by nonlinear coupling among shear Alfven waves in a mirror-confined plasma (2015)
  • Author(s): R. Ikezoe, M. Ichimura, T. Okada, M. Hirata, T. Yokoyama, Y. Iwamoto, S. Sumida, S. Jang, K. Takeyama, M. Yoshikawa, J. Kohagura, Y. Shima, and X. Wang
  • Journal Title: Phys. Plasmas Volume: 22 Issue: 9 Pages: 90701-90701
  • DOI: 10.1063/1.4930216
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Extension of Operational Regimes with ICRF Heating on GAMMA 10/PDX (2015)
  • Author(s): R. Ikezoe, M. Ichimura, M. Hirata, T. Yokoyama, Y. Iwamoto, T. Okada, S. Sumida, K. Takeyama, S. Jang, T. Oi, K. Ichimura, Y. Nakashima
  • Journal Title: Fusion Sci.Technol. Volume: 68 Issue: 1 Pages: 63-69
  • DOI: 10.13182/fst14-853
  • Peer Reviewed
• [Journal Article] Internal Measurement of Propagation of ICRF Waves by Using Reflectometers on GAMMA 10 (2015)
  • Author(s): T. Okada, R. Ikezoe, M. Ichimura, M. Hirata, T. Yokoyama, Y. Iwamoto, S. Sumida, K. Takeyama, S. Jang, M. Yoshikawa, J. Kohagura, Y. Shima
  • Journal Title: Fusion Sci.Technol. Volume: 68 Issue: 1 Pages: 161-165
  • DOI: 10.13182/fst14-898
  • Peer Reviewed
• [Journal Article] High-Density Plasma Production in the GAMMA 10 Central Cell with ICRF Heating on Both Anchor Cells (2015)
  • Author(s): S. Sumida, M. Ichimura, T. Yokoyama, M. Hirata, R. Ikezoe, Y. Iwamoto, T. Okada, K. Takeyama, S. Jang, M. Sakamoto, Y. Nakashima, M. Yoshikawa, R. Minami, K. Oki, M. Mizuguchi, K. Ichimura
  • Journal Title: Fusion Sci.Technol. Volume: 68 Issue: 1 Pages: 136-141
  • DOI: 10.13182/fst14-890
  • Peer Reviewed
• [Journal Article] Analysis of Wave Excitation of the Phase-Control ICRF Antennas with Three-Dimensional Full Wave Code on GAMMA 10 (2015)
  • Author(s): T. Yokoyama, M. Ichimura, A. Fukuyama, S. Sumida, M. Hirata, R. Ikezoe, Y. Iwamoto, T. Okada, K. Takeyama, S. Jang
  • Journal Title: Fusion Sci.Technol. Volume: 68 Issue: 1 Pages: 185-189
  • DOI: 10.13182/fst14-899
  • Peer Reviewed
• [Presentation] Recent Studies Toward ICRF Heating of a High Density Linear Plasma on GAMMA 10/PDX (2018)
  • Author(s): R. Ikezoe, M. Ichimura, M. Hirata, S. Sumida, S. Jang, J. Itagaki, K. Izumi, A. Tanaka, Y. Kubota, R. Sekine, J. Kohagura, Y. Shima, M. Yoshikawa, R. Minami, M. Sakamoto, and Y. Nakashima
  • Organizer: Japan-Korea Workshop on Physics and Technology of Heating and Current Drive in Fusion Plasmas
  • Int'l Joint Research
• [Presentation] GAMMA 10/PDXにおける高速イオンの軸方向輸送解明に向けた波動計測の高度化 (2017)
  • Author(s): 池添竜也，市村真，板垣惇平，泉昂希，平田真史，隅田脩平，ジャンソウォン，田中温人，坂本瑞樹，中嶋洋輔
  • Organizer: 仙台プラズマフォーラム 『プラズマ流の基礎と応用に関する研究会』 電気通信研究所共同プロジェクト研究会 『プラズマ流中マルチスケール構造形成による新規反応場の開拓に関する研究会』
  • Place of Presentation: 東北大学工学研究科（宮城県仙台市）
  • Year and Date: 2017-03-02
• [Presentation] Measurement of ICRF wave propagation using a microwave reflectometer with fast antenna switching on GAMMA 10 (2017)
  • Author(s): R. Ikezoe, M. Ichimura, J. Itagaki, M. Hirata, S. Sumida, S. Jang, K. Izumi, A. Tanaka, R. Sekine, Y. Kubota, Y. Shima, J. Kohagura, M. Yoshikawa, M. Sakamoto, and Y. Nakashima
  • Organizer: 18th International symposium on Laser-Aided Plasma Diagnostics
  • Int'l Joint Research
• [Presentation] Correction of time varying offset in a heterodyne reflectometer for fluctuation measurement on GAMMA 10 (2017)
  • Author(s): J. Itagaki, R. Ikezoe, M. Ichimura, M. Hirata, S. Sumida, S. Jang, K. Izumi, A. Tanaka, R. Sekine, Y. Kubota, Y. Shima, J. Kohagura, M. Yoshikawa, M. Sakamoto and Y. Nakashima
  • Organizer: 18th International symposium on Laser-Aided Plasma Diagnostics
  • Int'l Joint Research
• [Presentation] GAMMA 10/PDXにおけるICRF高周波を用いた端損失イオンの制御 (2017)
  • Author(s): ジャン ソウォン，市村 真，平田 真史，池添 竜也，坂本 瑞樹，隅田 脩平，板垣惇平，泉 昂希，田中 温人，久保田 裕士，関根 諒，中嶋 洋輔
  • Organizer: Plasma Conference 2017
• [Presentation] GAMMA 10における自発励起ICRF波動に起因する端損失高エネルギーイオンの測定 (2017)
  • Author(s): 泉昂希，池添竜也，市村真，平田真史，坂本瑞樹，隅田脩平，ジャンソウォン，板垣惇平，田中温人，久保田裕士，関根諒，中嶋洋輔
  • Organizer: Plasma Conference 2017
• [Presentation] GAMMA 10における位相制御ICRF加熱のプラズマ内部波動の評価 (2017)
  • Author(s): 板垣惇平，池添竜也，市村真，平田真史，隅田脩平，ジャンソウォン，泉昂希，田中温人，関根諒，久保田裕士，嶋頼子，小波蔵純子，吉川正志，坂本瑞樹，中嶋洋輔
  • Organizer: Plasma Conference 2017
• [Presentation] GAMMA 10/PDXを用いた高密度直線プラズマのイオン加熱に向けた取り組み (2017)
  • Author(s): 池添竜也, 市村真, ジャンソウォン, 平田真史, 隅田脩平, 板垣惇平, 泉昂希, 田中温人, 久保田裕士, 関根諒, 坂本瑞樹, GAMMA 10/PDXグループ
  • Organizer: Plasma Conference 2017
• [Presentation] ICRF heating based approach for production of a linear plasma with high ion temperature (2017)
  • Author(s): R. Ikezoe, M. Ichimura, S. Jang, M. Hirata, S. Sumida, J. Itagaki, K. Izumi, A. Tanaka, Y. Kubota, R. Sekine, M. Sakamoto, and Y. Nakashima
  • Organizer: 6th International Workshop on Plasma Material Interaction Facilities for Fusion Research
  • Int'l Joint Research
• [Presentation] Studies on ion heating of the GAMMA 10/PDX plasma in a higher density regime toward a future divertor simulating linear device (2017)
  • Author(s): R. Ikezoe, M. Ichimura, S. Jang, M. Hirata, S. Sumida, J. Itagaki, K. Izumi, A. Tanaka, Y. Kubota, R. Sekine, M. Sakamoto, and Y. Nakashima
  • Organizer: 59th Annual Meeting of the APS Division of Plasma Physics
  • Int'l Joint Research
• [Presentation] アンテナスイッチングを用いた反射計による高温プラズマ内部アルベン波動の径方向と磁力線方向の構造計測 (2016)
  • Author(s): 池添竜也，市村真，板垣惇平，平田真史，隅田脩平，ジャンソウォン，泉昂希，田中温人，吉川正志，小波蔵純子，坂本瑞樹，中嶋洋輔
  • Organizer: 第33回プラズマ・核融合学会年会
  • Place of Presentation: 東北大学青葉山キャンパス（宮城県仙台市）
  • Year and Date: 2016-11-29
• [Presentation] Probing of high-frequency coherent fluctuations by using a two-channel microwave reflectometer with antenna switching (2016)
  • Author(s): R. Ikezoe, M. Ichimura, J. Itagaki, M. Hirata, S. Sumida, S. Jang, K. Izumi, A. Tanaka, M. Yoshikawa, J. Kohagura, M. Sakamoto, Y. Nakashima
  • Organizer: 58th Annual Meeting of the APS Division of Plasma Physics
  • Place of Presentation: San Jose, USA
  • Year and Date: 2016-10-31
  • Int'l Joint Research
• [Presentation] Spatial Structure of Spontaneously Excited ICRF Waves and Relevant High-Energy Ion Loss in the GAMMA 10 Tandem Mirro (2016)
  • Author(s): R. Ikezoe, M. Ichimura, M. Hirata, T. Okada, S. Sumida, S. Jang, J. Itagaki, M. Yoshikawa, J. Kohagura, M. Sakamoto, Y. Nakashima
  • Organizer: 26th IAEA Fusion Energy Conference
  • Place of Presentation: Kyoto International Conference Center, Kyoto city, Japan
  • Year and Date: 2016-10-17
  • Int'l Joint Research
• [Presentation] Development of internal ICRF wave detection using microwave reflectometry on GAMMA 10 (2016)
  • Author(s): R. Ikezoe, M. Ichimura, J. Itagaki, M. Hirata, S. Sumida, S. Jang, M. Yoshikawa, J. Kohagura, M. Sakamoto, Y. Nakashima
  • Organizer: 11th International Conference on Open Magnetic Systems for Plasma Confinement
  • Place of Presentation: Novosibirsk, Russia
  • Year and Date: 2016-08-08
  • Int'l Joint Research
• [Presentation] アンテナスイッチグを用いた反射計による多点 ICRF波動計測 (2016)
  • Author(s): 池添竜也，市村真，板垣惇平，平田真史，隅田脩平，ジャンソウォン，泉昂希，田中温人，吉川正志，小波蔵純子，坂本瑞樹，中嶋洋輔
  • Organizer: 第6回ICRF研究会「ICRF加熱装置の高性能化と将来応用」
  • Place of Presentation: 核融合科学研究所（岐阜県土岐市）
• [Presentation] GAMMA10高温プラズマ中のアルベン波動の2点相関 (2015)
  • Author(s): 池添竜也，市村真，岡田拓也，板垣惇平，平田真史，坂本瑞樹，岩本嘉章，隅田脩平，ジャンソウォン，小野寺悠斗，吉川正志，小波蔵純子，嶋頼子，王小龍，中嶋洋輔
  • Organizer: 第32回プラズマ・核融合学会年会
  • Place of Presentation: 名古屋大学（愛知県名古屋市）
  • Year and Date: 2015-11-24
• [Presentation] GAMMA10内部領域における反射計を用いたICRF波動の吸収と伝搬計測 (2015)
  • Author(s): 岡田拓也，池添竜也，市村真，平田真史，坂本瑞樹，隅田脩平，岩本嘉章，ジャンソウォン，板垣惇平，小野寺悠斗，吉川正志，小波蔵純子，嶋頼子，中嶋洋輔
  • Organizer: 第32回プラズマ・核融合学会年会
  • Place of Presentation: 名古屋大学（愛知県名古屋市）
  • Year and Date: 2015-11-24
• [Presentation] GAMMA10セントラル部におけるマイクロ波反射計を用いた低周波波動励起の観測 (2015)
  • Author(s): 板垣惇平，池添竜也，岡田拓也，市村真，平田真史，坂本瑞樹，隅田脩平，岩本嘉章，ジャンソウォン，小野寺悠人，吉川正志，小波蔵純子，嶋頼子，中嶋洋輔
  • Organizer: 第32回プラズマ・核融合学会年会
  • Place of Presentation: 名古屋大学（愛知県名古屋市）
  • Year and Date: 2015-11-24
• [Presentation] Excitation of low-frequency waves via coupling between slow Alfven waves in the GAMMA 10 tandem mirror (2015)
  • Author(s): R. Ikezoe, M. Ichimura, T. Okada, M. Hirata, T. Yokoyama, Y. Iwamoto, S. Sumida, K. Takeyama, S. Jang, T. Oi, M. Yoshikawa, J. Kohagura, Y. Shima
  • Organizer: 57th Annual Meeting of the APS Division of Plasma Physics
  • Place of Presentation: Savannah, USA
  • Year and Date: 2015-11-16
  • Int'l Joint Research
• [Presentation] Measurement of the ICRF wave propagation in the internal region of plasmas by using reflectometers on GAMMA10 (2015)
  • Author(s): T. Okada, R. Ikezoe, M. Ichimura, M. Hirata, S. Sumida, Y. Iwamoto, S. Jang, J. Itagaki, Y. Onodera, M. Yoshikawa, J. Kohagura, Y. Shima
  • Organizer: 57th Annual Meeting of the APS Division of Plasma Physics
  • Place of Presentation: Savannah, USA
  • Year and Date: 2015-11-16
  • Int'l Joint Research
• [Presentation] GAMMA 10/PDXダイバータ模擬実験に向けたICRFによる熱及び粒子束制御の進展 (2015)
  • Author(s): 池添竜也，市村 真，平田真史，坂本瑞樹，隅田脩平，ジャンソウォン，岩本嘉章，岡田拓也，板垣淳平，小野寺悠斗，市村和也，中嶋洋輔
  • Organizer: 平成27年度第1回ダイバータ物理・工学合同研究会
  • Place of Presentation: つくばサイエンス・インフォメーションセンター（茨城県つくば市）
  • Year and Date: 2015-07-30