Determination of Viscosity Coefficient by Using Flow-Velocity Field Measurement of Magnetized Plasma Vortex

• Project/Area Number: 19740348
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Plasma science
• Research Institution: National Institute for Fusion Science
• Principal Investigator: YOSHIMURA Shinji National Institute for Fusion Science, 大型ヘリカル研究部, 助教 (50311204)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥3,530,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥330,000); Fiscal Year 2008: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2007: ¥2,100,000 (Direct Cost: ¥2,100,000)
• Keywords: プラズマ基礎 / プラズマ / 流れ / レーザー誘起蛍光法 / 粘性 / 方向性プローブ / HYPER-I装置 / プラズマホール

Research Abstract

プラズマの流れ構造の決定には様々な力が関係しているが、実験室プラズマにおいては粘性の効果はこれまで無視されてきた。これは衝突に基づく古典粘性係数が非常に小さいためである。本研究ではプラズマの流れと粘性の間の関係式を導き、実験によって計測した流速場から実効的な粘性係数を決定した。その結果、特異な構造をもたない実験室プラズマにおいても、古典粘性より2桁大きな異常粘性が観測された。また、精度の良い流れ計測のためにレーザーを用いた流速計測系を導入した。

Research Products

• [Journal Article] Measurement of Ion Flow Velocity Field Associated with Plasma Hole Using Laser Induced Fluorescence Spectroscopy (2009)
  • Author(s): 吉村信次、岡本敦、田中雅慶
  • Journal Title: Journal of Plasma and Fusion Research Series (掲載確定)
  • Peer Reviewed
• [Journal Article] Laser Induced Fluorescence Measurement of He/Ar Mixture Plasma Hole (2009)
  • Author(s): 吉村信次、岡本敦、田中雅慶
  • Journal Title: Proceedings of Plasma Science Symposium 2009/The 26th Symposium on Plasma Processing Pages: 126-127
• [Journal Article] Laser-Induced FluoresCence Measurement of He/Ar Mixture Plasma Hole (2009)
  • Author(s): Shinji Yoshimura
  • Journal Title: Plasma Science Symposium 2009/The 26^<th> Symposium on Plasma Processing Proceedings 1 Pages: 126-127
• [Journal Article] Quasi-neutrality Breaking in a Rotating Plasma (2008)
  • Author(s): 田中雅慶、吉村信次
  • Journal Title: IEEE Transactions on Plasma Science 36 Pages: 1224-1225
  • Peer Reviewed
• [Journal Article] ovo Vranjes、Vortex Formation in a Plasma Interacting with Neutral Flow (2008)
  • Author(s): 田中雅慶、荒巻光利、荻原公平、江藤修三、吉村信次
  • Journal Title: FRONTIERS IN MODERN PLASMA PHYSICS edited by P. K. Shukla, B. Eliasson, and L. Stenflo (AIP Press) Pages: 57-65
• [Journal Article] Viscosity Estimation Utilizing Flow Velocity Field Measurement in a Rotating Magnetized Plasma (2008)
  • Author(s): 吉村信次、田中雅慶
  • Journal Title: Proceedings of the 17th International Toki Conference on Physics of Flows and Turbulence in Plasmas and 16th International Stellarator/Heliotron Workshop 2007(NIFS-PROC Series) 69 Pages: 238-241
• [Journal Article] Quasi-neutrality Breaking in a Rotating Plasma (2008)
  • Author(s): Masayoshi Y. Tanaka
  • Journal Title: IEEE Transactions on Plasma Science 36 Pages: 1224-1225
  • Peer Reviewed
• [Journal Article] LIF Measurement of Neutral Flow Using a Tunable Diode Laser (2007)
  • Author(s): 荻原公平、江藤修三、荒巻光利、吉村信次、田中雅慶
  • Journal Title: Proceedings of the 13th International Symposium on Laser-Aided Plasma Diagnostics (NIFS-PROC Series) 68 Pages: 92-95
• [Journal Article] LIF measurement of neutral flow using a tunable diode laser (2007)
  • Author(s): Kohei Ogiwara
  • Journal Title: NIFS-PROC Series 68 Pages: 92-95
  • Peer Reviewed
• [Presentation] Measurement of Ion Flow Velocity Field Associated with Plasma Hole Using Laser Induced Fluorescence Spectroscopy (2009)
  • Author(s): Shinji Yoshimura
  • Organizer: International Congress on Plasma Physics 2008
  • Place of Presentation: 福岡国際会議場
  • Year and Date: 2009-09-09
• [Presentation] LIF法による密度ホールを伴うプラズマ渦(プラズマホール)の速度場計測 (2009)
  • Author(s): 吉村信次
  • Organizer: 日本物理学会第64回年次大会
  • Place of Presentation: 立教大学
  • Year and Date: 2009-03-30
• [Presentation] He/Ar混合プラズマホールのLIF計測 (2009)
  • Author(s): 吉村信次
  • Organizer: プラズマ科学シンポジウム2009
  • Place of Presentation: 名古屋大学
  • Year and Date: 2009-02-02
• [Presentation] ピラミッド型プローブを用いたプラズマ流速計測 (2008)
  • Author(s): 吉村信次
  • Organizer: 第25回プラズマ・核融合学会
  • Place of Presentation: 栃木県総合文化センター
  • Year and Date: 2008-12-04
• [Presentation] ピラミッド型プローブを用いたプラズマ流速計測 (2008)
  • Author(s): 吉村信次
  • Organizer: 第25回プラズマ・核融合学会年会
  • Place of Presentation: 栃木県総合文化センター
  • Year and Date: 2008-12-04
• [Presentation] Laser Induced Fluorescence Measurement of Plasma Hole in a Helium Plasma with Argon Impurity (2008)
  • Author(s): 吉村信次
  • Organizer: 第50回米国物理学会プラズマ物理分科会(APS-DPP2008)
  • Place of Presentation: ダラス・ハイアットリージェンシー(米国)
  • Year and Date: 2008-11-19
• [Presentation] Laser Induced Fluorescence Measurement of Plasma Hole in a Helium Plasma with Argon Impurity (2008)
  • Author(s): Shinji Yoshimura
  • Organizer: 50^<th> Annual Meeting of the Division of Plasma Physics
  • Place of Presentation: Hyatt Regency Dallas
  • Year and Date: 2008-11-19
• [Presentation] 軸対称円柱磁化プラズマにおける径方向流と粘性 (2008)
  • Author(s): 吉村信次
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 岩手大学
  • Year and Date: 2008-09-23
• [Presentation] Measurement of Ion Flow Velocity Field Associated with Plasma Hole Using Laser Induced Fluorescence Spectroscopy (2008)
  • Author(s): 吉村信次
  • Organizer: プラズマ物理に関する国際会議2008(ICPP2008)
  • Place of Presentation: 福岡国際会議場
  • Year and Date: 2008-09-09
• [Presentation] レーザー誘起蛍光法を用いたプラズマホールの流れ場計測 (2008)
  • Author(s): 岡本敦
  • Organizer: 日本物理学会第63回年次大会
  • Place of Presentation: 近畿大学
  • Year and Date: 2008-03-23
• [Presentation] 磁化プラズマ中におけるプラズマホール形成 (2007)
  • Author(s): 吉村信次
  • Organizer: 第24回プラズマ・核融合学会年会
  • Place of Presentation: イーグレ姫路
  • Year and Date: 2007-11-28
• [Presentation] Evaluation of Kinematic Viscosity of Rotating Cylindrical Plasmas Using Flow Velocity Profile Measurements (2007)
  • Author(s): 吉村信次
  • Organizer: 第49回米国物理学会プラズマ物理分科会(APS-DPP2007)
  • Place of Presentation: オーランド・ローゼンセンターホテル(米国)
  • Year and Date: 2007-11-14
• [Presentation] Evaluation of Kinematic Viscosity of Rotating Cylindrical Plasmas Using Flow Velocity Profile Measurements (2007)
  • Author(s): Shinji Yoshimura
  • Organizer: 49th Annual Meeting of the Division of Plasma Physics
  • Place of Presentation: Rosen Centre Hotel
  • Year and Date: 2007-11-14
• [Presentation] Viscosity estimation utilizing flow velocity field measurements in a rotating magnetized plasma (2007)
  • Author(s): 吉村信次
  • Organizer: 第17回国際土岐コンファレンス(ITC-17)
  • Place of Presentation: セラトピア土岐
  • Year and Date: 2007-10-16
• [Presentation] Viscosity estimation utilizing flow velocity field measurements in a rotating magnetized plasma (2007)
  • Author(s): Shinji Yoshimura
  • Organizer: 17th International Toki Conference
  • Place of Presentation: Ceratopia Toki
  • Year and Date: 2007-10-16
• [Presentation] プラズマホールの流れ構造における遠心力と異常粘性の寄与 (2007)
  • Author(s): 吉村信次
  • Organizer: 日本物理学会第62回年次大会
  • Place of Presentation: 北海道大学
  • Year and Date: 2007-09-22