Measurement of electron Bernstein wave emission to search the optimum injection condition to heat the central region of the extremely high dense plasma

2013 Fiscal Year Final Research Report

• Project/Area Number: 23561006
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nuclear fusion studies
• Research Institution: National Institute for Fusion Science
• Principal Investigator: IGAMI Hiroe 核融合科学研究所, ヘリカル研究部, 准教授 (10390634)
• Co-Investigator(Renkei-kenkyūsha): KUBO Shin 核融合科学研究所, 教授 (80170025) ; SHIMOZUMA Takashi 核融合科学研究所, 教授 (80270487) ; YOSHIMURA Yasuo 核融合科学研究所, 准教授 (90300730) ; TAKAHASHI Hiromi 核融合科学研究所, 教授 (00462193) ; IDEI Hiroshi 九州大学, 応用力学研究所, 教授 (70260049)
• Project Period (FY): 2011 – 2013
• Keywords: 炉心プラズマ / 電子バーンシュタイン波加熱

Research Abstract

For the electron cyclotron heating (ECH) in over-dense plasmas by launching the electron cyclotron (EC) wave from the low magnetic field side, the electron Bernstein wave (EBW) excited via the ordinary - extraordinary - EBW (OXB) mode conversion process is used. To excite the EBW, the ordinary mode should be launched toward the restricted range of the injection angle, so called "OXB mode conversion window". The EBW emitted thermally in the electron cyclotron resonance (ECR) layer in the over-dense region, can be radiated as an electromagnetic wave via the B-X-O mode conversion process, which is the reverse process of the heating. To survey the "OXB mode conversion window" experimentally, an waveguide switch was installed in the middle of the ECH transmission line to send the emission from the plasma to a heterodyne radiometer system. As the first results, we have observed emission with the radiometer when an over-dense plasma is generated.

Research Products

• [Journal Article] Electron Bernstein wave heating and emission measurement through the very narrow O-X-B mode conversion window in the LHD (2014)
  • Author(s): H.Igami, S.Kubo, T.Shimozuma, Y.Yoshimura, H.Takahashi, M. Nishiura, Ogasawara, R. Makino, H. Idei, K. Nagasaki, T. Seki, T. Mutoh
  • Journal Title: AIP Conf. Proc. Volume: 1580 Pages: 490
• [Journal Article] Progress of ECRH by EBW in over-dense plasmas and controlling the confinement regime by ECCD with high power launching in LHD (2012)
  • Author(s): H. Igami, Y. Yoshimura, H. Takahashi, T. Shimozuma, S. Kubo, H. Idei, M. Nishiura, S. Ogasawara, R. Makino S. Ohdachi, K. Ida, M. Yoshinuma, Ido, A. Shimizu, N. Tamura, S. Inagaki and T. Mutoh
  • Journal Title: EPJ Web of Conference Volume: 32 Pages: 02006
• [Journal Article] Experimental Results for Electron Bernstein Wave Heating in the Large Helical Device (2012)
  • Author(s): H. Igami, S. Kubo, T. Shimozuma, Y. Yoshimura, H. Takahashi, H. Idei, M. Nishiura, S. Ogasawara, R. Makino, R. Kumazawa, T. Mutoh, A. Sagara and T. Goto
  • Journal Title: Plasma and Fusion Research Volume: 7 Pages: 2402110
  • Peer Reviewed
• [Journal Article] Measurement of the Electron Bernstein Wave Emission with One of the Power Transmission Lines for ECH in LHD (2011)
  • Author(s): IGAMI Hiroe, IDEI Hiroshi, KUBO Shin, YOSHIMURA Yasuo, SHIMOZUMA Takashi, and TAKAHASHIHiromi
  • Journal Title: Plasma Science and Technology Volume: 13 Pages: 405
  • Peer Reviewed
• [Presentation] lectron Bernstein wave heating and emission measurement through the very narrow O-X-B mode conversion window in the LHD (2013)
  • Author(s): H. Igami, 他
  • Organizer: 20th Topical Conference on Radio Frequency Power in Plasmas
  • Place of Presentation: Sorrento, Italy(ポスター発表)
  • Year and Date: 20130625-28
• [Presentation] LHDにおけるアンテナ放電中掃引を用いたOXBモード変換窓探査 (2013)
  • Author(s): 伊神弘恵, 他
  • Organizer: プラズマ・核融合学会第30回年会
  • Place of Presentation: 東京工業大学大岡山キャンパス(東京都)(口頭発表)
  • Year and Date: 20130203-06
• [Presentation] 磁場配位最適化による基本共鳴周波数帯の電子バーシュタイン波加熱による高密度プラズマの中心部加熱 (2012)
  • Author(s): 伊神弘恵, 他
  • Organizer: プラズマ・核融合学会第29回年会
  • Place of Presentation: クローバープラザ(福岡県春日市)
  • Year and Date: 20121127-30
  • Invited
• [Presentation] Progress of ECRH by EBW in over-dense plasmas and controlling the confinement regime by ECCD with high power launching in LHD (2012)
  • Author(s): H. Igami, 他
  • Organizer: 17th joint workshop on Electron cyclotron Emission and Electron Cyclotron Resonance Heating
  • Place of Presentation: Deurne, Netherlands(口頭発表)
  • Year and Date: 20120510-17
• [Presentation] Experimental results of electron Bernstein wave heating on the LHD and consideration for a helical type fusion device (2011)
  • Author(s): H. Igami, S. Kubo, T. Shimozuma, Y. Yoshimura, H. Takahashi, H. Idei, M. Nishiura, S. Ogasawara, R. Makino, R. Kumazawa, T. Mutoh, A. Sagara, T. Goto
  • Organizer: International Toki Conference 21
  • Place of Presentation: Toki, Japan(ポスター発表)
  • Year and Date: 20111129-1201
• [Presentation] HDにおけるOXBモード変換過程を介した電子バーンシュタイン波加熱実験 (2011)
  • Author(s): 伊神弘恵, 久保伸, 下妻隆, 吉村泰夫, 高橋裕己, 出射浩, 他5名
  • Organizer: Plasma Conference 2011
  • Place of Presentation: 石川県立音楽堂(口頭発表)
  • Year and Date: 20111122-25