Investigation of the electric field formation through development of a multi-channel heavy ion beam probe

2010 Fiscal Year Final Research Report

• Project/Area Number: 20686062
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Nuclear fusion studies
• Research Institution: National Institute for Fusion Science
• Principal Investigator: IDO Takeshi National Institute for Fusion Science, ヘリカル研究部, 准教授 (50332185)
• Project Period (FY): 2008 – 2010
• Keywords: 電位計測 / 重イオンビームプローブ / HIBP / 高エネルギー粒子検出器 / 電場 / GAM

Research Abstract

The heavy ion beam probe (HIBP) on the Large Helical Device has been improved to investigate behaviors of the electric field and fluctuations which determine the confinement of magnetically confined plasmas. The observations by the improved HIBP have brought the following results : (1) Measured electric field profiles agree with the prediction by the neoclassical theory. (2) The outward impurity flux observed in the core plasmas cannot be explained only by the radial electric field.. (3) Zonal flow is induced by energetic particles and appears in the central region of the plasmas.

Research Products

• [Journal Article] Experimental study of radial electric field and electrostatic potential fluctuation in the Large Helical Device (2010)
  • Author(s): Takeshi.Ido, Akihiro Shimizu, Masaki Nishiura, 他22名
  • Journal Title: Plasma Physics and Controlled Fusion Vol.52 Pages: 124025-1-"124025-14"
  • Peer Reviewed
• [Journal Article] Potential Fluctuation Associated with Energetic-Particle Induced Geodesic Acoustic Mode in Reversed Magnetic Shear Plasmas on LHD (2010)
  • Author(s): Takeshi.Ido, Akihiro Shimizu, Masaki Nishiura, 他17名
  • Journal Title: 第23回IAEA核融合エネルギー会議プロシーディング,No.EXW/4-3Rb, Daejeon, Korea
  • Peer Reviewed
• [Journal Article] Experimental Study of Potential Profile Formation in Large Helical Device (2010)
  • Author(s): Akihiro Shimizu, Takeshi.Ido, Masaki Nishiura, 他21名
  • Journal Title: 第23回IAEA核融合エネルギー会議プロシーディング,No.EXC/P4-11, Daejeon, Korea
  • Peer Reviewed
• [Journal Article] Development of 6-MeV Heavy Ion Beam Probe on LHD (2010)
  • Author(s): Takeshi.Ido, Akihiro Shimizu, Masaki Nishiura, 他12名
  • Journal Title: Fusion Science Technology vol.58 Pages: 436-444
  • Peer Reviewed
• [Journal Article] Potential measurement with the 6-MeV Heavy Ion Beam Probe of LHD (2010)
  • Author(s): Akihiro Shimizu, Takeshi.Ido, Masaki Nishiura, 他32名
  • Journal Title: Plasma and Fusion Research(第18回国際土岐コンファレンス口頭発表) 5 Pages: S1015 1-5
  • Peer Reviewed
• [Journal Article] Development of a heavy ion beam probe for measuring electrostatic potential profile and its fluctuation in LHD (2009)
  • Author(s): Takeshi.Ido, Akihiro Shimizu, Masaki Nishiura, 他13名
  • Journal Title: Plasma Science and Technology vol.11 Pages: 460
  • Peer Reviewed
• [Journal Article] Measurement of electrostatic potential fluctuation using heavy ion beam probe in Large Helical Device (2008)
  • Author(s): Takeshi.Ido, Akihiro Shimizu, Masaki Nishiura, 他11名
  • Journal Title: Review of Scientific Instruments vol.79 Pages: 10F318(4)
  • Peer Reviewed
• [Journal Article] Measurements of spatial structure of plasma potential and density fluctuations by multichannel heavy ion beam probe on large helical device (2008)
  • Author(s): Shinsuke Ohshima, Takeshi.Ido, Akihiro Shimizu, Masaki Nishiura, Haruhisa Nakano
  • Journal Title: Review of Scientific Instruments vol.79 Pages: 10F320(3)
  • Peer Reviewed
• [Journal Article] Electrostatic Potential Measurement by Using 6-MeV Heavy Ion Beam Probe on LHD (2008)
  • Author(s): Ido T., Shimizu A., Nishiura M., 他17名
  • Journal Title: Plasma and Fusion Research vol.3 Pages: 031(8)
  • Peer Reviewed
• [Presentation] LHDにおける高速イオン誘起Geodesic acoustic modeの振る舞い (2010)
  • Author(s): 井戸毅
  • Organizer: 第27回プラズマ・核融合学会年会
  • Place of Presentation: 北海道札幌市
  • Year and Date: 2010-12-02
• [Presentation] Potential Fluctuation Associated with Energetic-Particle Induced Geodesic Acoustic Mode on LHD (2010)
  • Author(s): Takeshi Ido
  • Organizer: 第23回IAEA核融合エネルギー会議
  • Place of Presentation: 大韓民国 テジョン市
  • Year and Date: 2010-10-13
• [Presentation] Experimental study of radial electric field formation and electrostatic potential fluctuation in the Large Helical Device (2010)
  • Author(s): Takeshi Ido
  • Organizer: 第37回ヨーロッパ物理学会
  • Place of Presentation: アイルランドダブリン市(招待講演)
  • Year and Date: 2010-06-24
• [Presentation] 大型ヘリカル装置における高速イオン誘起Geodesic acoustic modeに伴う電位揺動の観測 (2010)
  • Author(s): 井戸毅
  • 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: 2010-06-11
• [Presentation] Observation of electrostatic potential fluctuation of Alfven eigen mode and geodesic acoustic mode in Large Helical Device (2009)
  • Author(s): Takeshi.Ido
  • Organizer: 第19回国際土岐会議
  • Place of Presentation: 岐阜県土岐市
  • Year and Date: 2009-12-09
• [Presentation] LHDにおける反転磁気シア配位形成時に励起される高速イオン励起アルヴェン固有モードとGAM周波数揺動の空間構造の観測 (2009)
  • Author(s): 井戸毅
  • Organizer: 日本物理学会第64回年次大会
  • Place of Presentation: 東京都豊島区立教大学池袋キャンパス
  • Year and Date: 2009-03-27
• [Presentation] Potential fluctuation measurement using a heavy ion beam probe during ECCD in LHD (2008)
  • Author(s): Takeshi Ido
  • Organizer: 14th International Congress on Plasma Physics
  • Place of Presentation: 福岡県福岡市 福岡国際会議場
  • Year and Date: 2008-09-08
• [Presentation] 大型ヘリカル装置における電位分布及びその揺動の振る舞い (2008)
  • Author(s): 井戸毅
  • Organizer: 第7回核融合エネルギー連合講演会
  • Place of Presentation: 青森県青森市
  • Year and Date: 2008-06-19
• [Presentation] Measurement of Electrostatic Potential Fluctuation using Heavy Ion Beam Probe in Large Helical Device (2008)
  • Author(s): Takeshi Ido
  • Organizer: 17th Topical Conference on High Temperature Plasma Diagnostics
  • Place of Presentation: Albuquerque, New Mexico, United States
  • Year and Date: 2008-05-14
• [Remarks] 「LHDにおける6MeV重イオンビームプローブ(HIBP)による電位分布・揺動計測の現状と将来展望」(解説記事)井戸毅, 清水昭博, 西浦正樹,プラズマ・核融合学会誌,vol.86, No.8, p.p.507-516(2010)