Theoretical study on trapped ion turbulence with strong resonance

• Project/Area Number: 25887041
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Plasma science
• Research Institution: Kyushu University
• Principal Investigator: KOSUGA Yusuke 九州大学, 学内共同利用施設等, 助教 (00700296)
• Project Period (FY): 2013-08-30 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000); Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: プラズマ乱流 / 位相空間 / 流れ / 輸送

Outline of Final Research Achievements

We have analyzed trapped ion turbulence with granulations. The results indicate i.) granulations broadens frequency spectrum, ii.) granulations decorrelate due to ExB scattering, flow shearing, and difference in precession speeds, and iii.) granulations can convert poloidal and toroidal flows via phase space. These results were reported in the form of conference talk and journal papers.

Research Products

• [Journal Article] Ion temperature gradient driven turbulence with strong trapped ion resonance (2014)
  • Author(s): Y. Kosuga, S.-I. Itoh, P.H. Diamond, K. Itoh, and M. Lesur
  • Journal Title: Physics of plasmas Volume: 21 Issue: 10 Pages: 1-10
  • DOI: 10.1063/1.4897179
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Relative Dispersion of Trapped Ion Granulations in Sheared Flows (2014)
  • Author(s): Yusuke KOSUGA, Sanae -I. ITOH, Patrick H. DIAMOND, Kimitaka ITOH, Maxime LESUR
  • Journal Title: Plasma Fusion Res. Volume: 9
  • NAID: 130005432256
  • Peer Reviewed
• [Journal Article] Conversion of poloidal flows into toroidal flows by phase space structures in trapped ion resonance driven turbulence (2013)
  • Author(s): Y. Kosuga, S-I. Itoh, P.H. Diamond, K. Itoh
  • Journal Title: Plasma Phys. Control. Fusion Volume: 55
  • Peer Reviewed
• [Presentation] Ion Temperature Gradient Driven Turbulence with Strong Precession Resonance (2014)
  • Author(s): 小菅佑輔
  • Organizer: Plasma Conference 2014
  • Place of Presentation: 新潟、日本
  • Year and Date: 2014-11-18 – 2014-11-21
• [Presentation] Progress on Transport Modeling by Trapped Ion Resonance Driven Turbulence (2014)
  • Author(s): Y. Kosuga
  • Organizer: 25th IAEA Fusion Energy Conference
  • Place of Presentation: St. Petersburg, Russia
  • Year and Date: 2014-10-13 – 2014-10-18
  • Invited
• [Presentation] Ion Temperature Gradient Driven Turbulence with Strong Precession Resonance (2014)
  • Author(s): Y. Kosuga
  • Organizer: 4th East Asian School and Workshop on Laboratory, Space, Astrophysical Plasmas
  • Place of Presentation: Harbin, China
  • Year and Date: 2014-07-28 – 2014-08-01
  • Invited
• [Presentation] Transport Reduc/on in Ion Temperature Gradient Driven Turbulence with Strong Precession Resonance (2014)
  • Author(s): Y. Kosuga
  • Organizer: 4th APTWG meeting
  • Place of Presentation: Fukuoka, Japan
  • Year and Date: 2014-06-10 – 2014-06-13
• [Presentation] 熱アバランチの渋滞によるExB流れの構造形成
  • Author(s): 小菅佑輔, P.H. Diamond, O.D. Gurcan, 伊藤早苗、伊藤公孝
  • Organizer: 日本物理学会 2013年秋季大会
  • Place of Presentation: 徳島大学
• [Presentation] How the Propagation of Heat-Flux Modulations Triggers ExB Flow Pattern Formation
  • Author(s): Y. Kosuga
  • Organizer: Annual Meeting of the 55th APS Division of Plasma Physics
  • Place of Presentation: Denver, Colorado
  • Invited
• [Presentation] Relative dispersion of trapped ion granulations in sheared flows
  • Author(s): Y. Kosuga, S-I. Itoh, P.H. Diamond, K. Itoh, M. Lesur
  • Organizer: 23rd International Toki Conference
  • Place of Presentation: 土岐、岐阜、日本
• [Presentation] シア流れと速度空間自由度を含んだプラズマ乱流による混合過程
  • Author(s): 小菅佑輔
  • Organizer: 日本物理学会 第６９回年次大会
  • Place of Presentation: 東海大学湘南キャンパス