Correlation between Spatial Structure of Alfv6n Eigenmodes and Anoma lous Transport of Fast Ions

• Project/Area Number: 21340175
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Plasma science
• Research Institution: National Institute for Fusion Science
• Principal Investigator: ISOBE Mitsutaka 核融合科学研究所, ヘリカル研究部, 准教授 (00300731)
• Co-Investigator(Kenkyū-buntansha): SHIMIZU Akihiro 核融合科学研究所, ヘリカル研究部, 助教 (00390633)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥9,880,000 (Direct Cost: ¥7,600,000、Indirect Cost: ¥2,280,000); Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2010: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2009: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
• Keywords: LHD / アルヴェン固有モード / 高速イオン / ヘリカルプラズマ / 中性粒子ビーム加熱 / TAE / 中性粒子ビーム加 / EPM

Research Abstract

Effects of toroidicity-induced Alfven eigenmodes on energetic-ion transport have been investigated in LHD plasmas heated by high-energy neutral beam injection. TAE-induced fast-ion losses were observed. The losses increase as the TAE fluctuation amplitude increases. The dependence of the observed TAE-induced fast-ion loss with respect to TAE fluctuation amplitude indicates that outward shift of a magnetic axis increases the anomalous fast-ion loss caused by TAE. This is supposed to be due to increase of orbit shift from flux surfaces and expansion of spatial distribution of TAEs in outward shifted plasmas.

Research Products

• [Journal Article] (2011)
  • Author(s): K. Toi, K. Ogawa, M. Isobe, et al.
  • Journal Title: Plasma Phys. Control. Fusion Volume: Vol.53 Pages: 24008-24008
• [Journal Article] Experimental Check of Deceleration of Neutral Beam-Injected Energetic Ions in the HL-2A Tokamak (2011)
  • Author(s): M.Isobe, et al.
  • Journal Title: Plasma and Fusion Research Volume: 6 Issue: 2 Pages: 024008-024008
  • DOI: 10.1088/0741-3335/53/2/024008
  • NAID: 130002059540
  • Peer Reviewed
• [Journal Article] Energetic-ion-driven global instabilities in stellarator/helical plasmas and comparison with tokamak plasmas (2011)
  • Author(s): K.Toi, K.Ogawa, M.Isobe, et al
  • Journal Title: Plasma Physics and Controlled Fusion Volume: 53 Pages: 24008-24008
  • Peer Reviewed
• [Journal Article] Experimental check of deceleration of neutral beam-injected energetic ions in the HL-2A tokamak (2011)
  • Author(s): M.Isobe, Yi Liu, et al.
  • Journal Title: Plasma and Fusion Research Volume: (受理済み)
  • NAID: 130002059540
  • Peer Reviewed
• [Journal Article] Fast-Particle Diagnostics on LHD (2010)
  • Author(s): M. Isobe, et al.
  • Journal Title: Fusion Science and Technology Volume: Vol.58 Pages: 426-435
• [Journal Article] Effect of Energetic-Ion Driven MHD Instabilities on Energetic-Ion Transport in Compact Helical System and Large Helical Device (2010)
  • Author(s): M. Isobe, et al.
  • Journal Title: Contrib. Plasma Phys. Volume: Vol.50 Pages: 540-545
• [Journal Article] Observation of energetic-ion losses induced by various MHD instabilities in the Large Helical Device(LHD) (2010)
  • Author(s): K. Ogawa, M. Isobe, et al.
  • Journal Title: Nuclear Fusion Volume: Vol.50 Pages: 84005-84005
• [Journal Article] Overview of Studies on Energetic-Ion-Driven MHD Instabilities in Stellarator/Helical Plasmas and Comparison with Tokamak (2010)
  • Author(s): K. Toi, M. Isobe, et al.
  • Journal Title: Contrib. Plasma Phys. Volume: Vol.50 Pages: 493-500
• [Journal Article] MHD Mode Destabilized by Energetic Ions on LHD (2010)
  • Author(s): K. Toi, M. Isobe, et al.
  • Journal Title: Fusion Science and Technology Volume: Vol.58 Pages: 186-193
• [Journal Article] Potential Measurement with the 6-MeV Heavy Ion Beam Probe of LHD (2010)
  • Author(s): A. Shimizu, et al.
  • Journal Title: Plasma and Fusion Research Volume: Vol.5
  • NAID: 130000442436
• [Journal Article] Effect of energetic-ion-driven MHD instabilities on energetic-ion transport in Compact Helical System and Large Helical Device (2010)
  • Author(s): M.Isobe, K.Ogawa, et al.
  • Journal Title: Contributions to Plasma Physics Volume: 50 Pages: 540-545
  • Peer Reviewed
• [Journal Article] Fast-particle diagnostics on LHD (2010)
  • Author(s): M.Isobe, M.Osakabe, et al.
  • Journal Title: Fusion Science & Technology Volume: 58 Pages: 426-435
  • Peer Reviewed
• [Journal Article] Energetic-particle modes driven by suprathermal electrons produced by off-axis second harmonic ECRH in Compact Helical System (CHS) (2010)
  • Author(s): M.Isobe, K.Toi, et al.
  • Journal Title: Nuclear Fusion Volume: 50 Pages: 84007-84007
  • Peer Reviewed
• [Journal Article] Fusion product diagnostics planned for LHD deuterium experiment (2010)
  • Author(s): M.Isobe, H.Yamanishi, et al.
  • Journal Title: Review of Scientific Instruments Volume: 81
  • Peer Reviewed
• [Journal Article] Characteristics of Anomalous Transport and Losses of Energetic Ions Caused by Alfvenic Modes in LHD Plasmas (2010)
  • Author(s): M.Isobe, K.Ogawa, et al.
  • Journal Title: Proceedings of 23^<rd> IAEA Fusion Energy Conference
• [Journal Article] Effect of energetic-ion-driven MHD instabilities on energetic-ion transport in Compact Helical System and Large Helical Device (2010)
  • Author(s): M.Isobe, K.Ogawa, K.Toi, et al.
  • Journal Title: Contributions to Plasma Physics (accepted for publication, 掲載確定)
  • Peer Reviewed
• [Journal Article] 8.11 Fast-particle diagnostics on LHD (2010)
  • Author(s): M.Isobe, M.Osakabe, et al.
  • Journal Title: Fusion Science and Technology (accepted for publication)
  • Peer Reviewed
• [Journal Article] Installation of Bidirectional Lost Fast-Ion Probe in the Large Helical Device (2009)
  • Author(s): K. Ogawa, M. Isobe, and K. Toi
  • Journal Title: J. Plasma Fusion Res. SERIES Volume: Vol.8 Pages: 655-658
• [Journal Article] Observation of Fast Ion Losses Induced by Various MHD Modes Driven by Fast Ions and Bulk Plasma Pressure in the Large Helical Device (2009)
  • Author(s): K. Ogawa, M. Isobe, et al.
  • Journal Title: Plasma and Fusion Research Volume: Vol.4 Pages: 33-33
  • NAID: 130000138095
• [Journal Article] Contribution of the Large Helical Device Plasmas to Aflven Eigenmode Physics in Toroidal Plasmas (2009)
  • Author(s): K. Toi, M. Isobe, et al.
  • Journal Title: Plasma Science and Technology Volume: Vo. 11 Pages: 377-380
• [Journal Article] Lorentz alpha orbit calculation in search of position suitable for escaping alpha diagnostics in ITER (2009)
  • Author(s): M.Isobe, D.Funaki, M.Sasao
  • Journal Title: Journal of Plasma Fusion Research SERIES 8 Pages: 330-333
  • Peer Reviewed
• [Journal Article] Installation of Bidirectional Lost Fast-Ion Probe in the Large Helical Device (2009)
  • Author(s): K.Ogawa, M.Isobe, K.Toi
  • Journal Title: Journal of Plasma Fusion Research SERIES 8 Pages: 655-658
  • Peer Reviewed
• [Journal Article] Observation of fast ion losses induced by various MHD modes driven by fast ions and bulk plasma pressure in the Large Helical Device (2009)
  • Author(s): K.Ogawa, M.Isobe, K.Toi, LHD Experiment Group
  • Journal Title: Plasma and Fusion Research 4
  • NAID: 130000138095
  • Peer Reviewed
• [Journal Article] Measurement of fast ion losses induced by toroidal Alfven eigenmode in the Large Helical Device (2009)
  • Author(s): M.Ogawa, M.Isobe, K.Toi, et al.
  • Journal Title: Proceedings of 11^<th> IAEA Technical Meeting on energetic particles in magnetic confinement systems 8
• [Presentation] Beam-ion losses due to magnetic field ripple under various plasma parameter ranges on the Large Helical Device (2011)
  • Author(s): K. Ogawa, M. Isobe, et al
  • Organizer: 21^<st> International Toki conference
  • Place of Presentation: Toki, Japan
• [Presentation] Observation of TAE Induced Convective/Diffusive Losses and Comparison with Orbit Following Model in LHD (2011)
  • Author(s): K. Ogawa, M. Isobe, et al
  • Organizer: Plasma Conference 2011
  • Place of Presentation: Ishikawa, Japan
• [Presentation] Magnetic Configuration Effects on TAE Induced Losses and Comparison with Orbit Following Model in LHD (2011)
  • Author(s): K. Ogawa, M. Isobe, et al
  • Organizer: The 12^<th> IAEA Technical Meeting on Energetic Particles in Magnetic Confinement Systems
  • Place of Presentation: Austin, Texas, the United state
• [Presentation] LHDにおける周辺部に強く局在化したヘリシティ誘起アルヴェン固有モードの観測 (2011)
  • Author(s): 小川国大、東井和夫、磯部光孝等
  • Organizer: 物理学会第66回年次大会
  • Place of Presentation: 新潟大学五十嵐キャンパス
• [Presentation] Energetic-particle experiments in the Large Helical Device (2011)
  • Author(s): M.Isobe, et al.
  • Organizer: 8^<th> General Scientific Assembly of the Asia Plasma and Fusion Association
  • Place of Presentation: 中華人民共和国・桂林
• [Presentation] Observation of MHD instabilities in an acoustic range of frequency in LHD ECRH plasmas with suprathermal electrons (2011)
  • Author(s): M.Isobe, et al.
  • Organizer: 12^<th> IAEA Technical Meeting on Energetic Particles in Magnetic Confinement System
  • Place of Presentation: アメリカ合衆国・オースチン
• [Presentation] Magnetic configuration effects on TAE induced losses and comparison with orbit following model in LHD (2011)
  • Author(s): K.Ogawa, M.Isobe, et al.
  • Organizer: 12^<th> IAEA Technical Meeting on Energetic Particles in Magnetic Confinement System
  • Place of Presentation: アメリカ合衆国・オースチン
• [Presentation] Radial profile of potential and electric field in the low density core plasma of the Large Helical Device (2011)
  • Author(s): A.Shimizu, et al.
  • Organizer: 1st Asia Pacific Transport Working Group (APTWG) International Conference
  • Place of Presentation: 岐阜県土岐市
• [Presentation] Potential profile measurement with heavy ion beam probe on the Large Helical Device (2011)
  • Author(s): A.Shimizu, et al.
  • Organizer: Plasma Conference 2011
  • Place of Presentation: 石川県金沢市
• [Presentation] Experimental check_of deceleration of neutral beam-injected energetic ions in the HL-2A tokamak (2010)
  • Author(s): M.Isobe, Yi Liu, et al.
  • Organizer: 20^<th> International Toki Conference on The Next Twenty Years in Plasma and Fusion Science
  • Place of Presentation: 岐阜県土岐市
  • Year and Date: 2010-12-07
• [Presentation] Characteristics of Anomalous Transport and Losses of Energetic Ions Caused by Alfvenic Modes in LHD Plasmas (2010)
  • Author(s): M.Isobe, K.Ogawa, et al.
  • Organizer: 23^<rd> IAEA Fusion Energy Conference
  • Place of Presentation: 大韓民国・デジョン
  • Year and Date: 2010-10-11
• [Presentation] ヘリカルプラズマにおけるECRH生成高速電子に起因したMHD不安定性の励起 (2010)
  • Author(s): 磯部光孝、東井和夫, 等
  • Organizer: 第8回核融合エネルギー連合講演会
  • Place of Presentation: 岐阜県高山市
  • Year and Date: 2010-06-10
• [Presentation] Fusion product diagnostics planned for LHD deuterium experiment (2010)
  • Author(s): M.Isobe, H.Yamanishi, et al.
  • Organizer: 18^<th> Topical Conference High-Temperature Plasma Diagnostics
  • Place of Presentation: アメリカ合衆国・ワイルドウッド
  • Year and Date: 2010-05-16
• [Presentation] LHDにおける高速イオン・圧力駆動MHD不安定性による高速イオン損失機構の検討 (2010)
  • Author(s): 小川国大、磯部光孝、東井和夫, 等
  • Organizer: 日本物理学会2010年春季大会
  • Place of Presentation: 岡山大学津島キャンパス
  • Year and Date: 2010-03-21
• [Presentation] Characteristics of Anomalous Transport and Losses of Energetic Ions Caused by Alfvenic Modes in LHD Plasmas (2010)
  • Author(s): M. Isobe, et al.
  • Organizer: 23^<rd> IAEA Fusion Energy Conference
  • Place of Presentation: Daejon, Korea
• [Presentation] Fast Ion Losses Induced by Toroidal Alfven Eigenmode and Resistive Interchange Mode in Various Magnetic Configurations of LHD (2010)
  • Author(s): K. Ogawa, M. Isobe, et al
  • Organizer: European Physical Society Conference
  • Place of Presentation: Dublin City University, Ireland
• [Presentation] LHDにおける高速イオン及びバルクプラズマ圧力駆動MHD不安定性による高速イオン損失の特性 (2010)
  • Author(s): 小川国大、磯部光孝等
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学中百舌鳥キャンパス
• [Presentation] LHDプラズマにおける種々のMHDモードによる高速イオン損失束の計測と損失機構の検討 (2009)
  • Author(s): 小川国大、磯部光孝、東井和夫, 等
  • Organizer: 第26回プラズマ・核融合学会年会
  • Place of Presentation: 京都市国際交流会館
  • Year and Date: 2009-12-04
• [Presentation] Effect of energetic-ion driven MHD instabilities on energetic-ion transport in Compact Helical System and Large Helical Device (2009)
  • Author(s): M. Isobe, et al.
  • Organizer: 17^<th> International Stellarator/Heliotron Workshop
  • Place of Presentation: Princeton, New Jersey, USA
• [Presentation] Measurement of Fast-Ion losses Induced by Toroidal Alfven Eigenmodes in the Large Helical Device (2009)
  • Author(s): K. Ogawa, M. Isobe, et al
  • Organizer: The 11^<th> IAEA Technical Meeting on Energetic Particles in Magnetic Confinement Systems
  • Place of Presentation: Kyiv, UkraineKyiv, Ukraine
• [Presentation] Effect of energetic-ion driven MHD instabilities on energetic-ion transport in Compact Helical System and Large Helical Device (2009)
  • Author(s): 磯部光孝, 小川国大, 東井和夫, et al.
  • Organizer: 17^<th> International Stellarator/Heliotron Workshop
  • Place of Presentation: 米国・ニュージャージー州プリンストン
• [Presentation] Summary of workshop on wave-particle interaction(WWPI)and ITPA EP (2009)
  • Author(s): 磯部光孝
  • Organizer: International workshop on fusion product diagnostics for burning plasma experiments
  • Place of Presentation: 愛知県美浜町
• [Presentation] Measurement of fast ion losses induced by toroidal Alfven eigenmode in the Large Helical Device (2009)
  • Author(s): 小川国大, 磯部光孝, 東井和夫, et al.
  • Organizer: 11^<th> IAEA Technical Meeting on energetic particles in magnetic confinement systems
  • Place of Presentation: ウクライナ・キエフ
• [Book] 講座:高速カメラを利用した磁場閉じ込めプラズマ計測「3.2次元センサーとしての高速カメラ」Journal of Plasma and Fusion Research (2010)
  • Author(s): 西野信博、大舘暁、磯部光孝等