Study of small scale effectts on macroscopic plasma instability based on extended MHD models for low collisionality plasmas

• Project/Area Number: 24740375
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Plasma science
• Research Institution: National Institute for Fusion Science
• Principal Investigator: ITO Atsushi 核融合科学研究所, ヘリカル研究部, 助教 (70413987)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
• Keywords: 電磁流体力学 / 拡張MHD / プラズマ不安定性 / 二流体MHD / 有限ラーマー半径効果 / プラズマ物理

Outline of Final Research Achievements

Theoretical studies of small scale effects on macroscopic dynamics of plasmas are carried out based on extended magnetohydrodynamic models. Two-fluid and finite ion temperature effects on the Rayleig-Taylor and Kelvin-Helmholtz instabilities in finite beta plasmas are examined and new condtions for the absence of complete stabilization of high-wavenumber modes are found. Linear eigenmode equations for tearing mode instability to analyse effects of heat flux in gyroviscosity that is a finite ion temperature effect are derived. These effects are not negligible for low collisionality plasmas. Coordinate systems to study stability of toroidal equilibrium with flow are also constructed.

Research Products

• [Journal Article] Formation of large-scale structures with sharp density gradient through RayleighTaylor growth in a two-dimensional slab under the two-fluid and finite Larmor radius effects (2015)
  • Author(s): R. Goto, H.Miura, A.Ito, M.Sato and T.Hatori
  • Journal Title: Physics of Plasmas Volume: 22 Issue: 3 Pages: 0321151-10
  • DOI: 10.1063/1.4916061
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Hall and Gyro-Viscosity Effects on the Rayleigh-Taylor Instability in a 2D Rectangular Slab (2014)
  • Author(s): R. Goto, H. Miura, A. Ito, M. Sato and T. Hatori
  • Journal Title: Plasma and Fusion Research Volume: 9 Issue: 0 Pages: 1403076-1403076
  • DOI: 10.1585/pfr.9.1403076
  • NAID: 130005089494
  • ISSN: 1880-6821
  • Peer Reviewed
• [Presentation] Parameter dependence of two-fluid and finite Larmor radius effects on Rayleigh-Taylor and Kelvin-Helmholtz instabilities in finite beta plasmas (2015)
  • Author(s): A. Ito, R. Goto, T. Hatori, H. Miura and M. Sato
  • Organizer: 2015 International Sherwood Fusion Theory Conference
  • Place of Presentation: New York University, New York （米国）
  • Year and Date: 2015-03-16 – 2015-03-18
• [Presentation] 拡張MHDモデルにおけるテアリング不安定性に対するジャイロ粘性テンソル中の磁力線方向の熱流束の効果 (2014)
  • Author(s): 伊藤淳、J.J. Ramos
  • Organizer: Plasma Conference 2014
  • Place of Presentation: 朱鷺メッセ（新潟県新潟市）
  • Year and Date: 2014-11-18 – 2014-11-21
• [Presentation] Magnetic flux coordinates for high-beta tokamak equilibria with flow (2014)
  • Author(s): A. Ito and N. Nakajima
  • Organizer: Annual Meeting of the APS Division of Plasma Physics
  • Place of Presentation: New Orleans Marriott Hotel, New Orleans （米国）
  • Year and Date: 2014-10-27 – 2014-10-31
• [Presentation] Effect of parallel heat flux in the gyroviscous tensor on tearing mode instability in two-fluid magnetohydrodynamic model (2014)
  • Author(s): A. Ito and J. J. Ramos
  • Organizer: 56th Annual Meeting of the APS Division of Plasma Physics
  • Place of Presentation: New Orleans Marriott Hotel, New Orleans （米国）
  • Year and Date: 2014-10-27 – 2014-10-31
• [Presentation] Toroidal Equilibria with Flow in High-Beta Reduced Magnetohydrodynamic Models (2013)
  • Author(s): A. Ito and N. Nakajima
  • Organizer: 12th Asia Pacific Physics Conference of AAPPS
  • Place of Presentation: 幕張メッセ（千葉県千葉市）
• [Presentation] 高ベータ簡約化MHDモデルにおけるポロイダル音速程度の流れをもつ平衡とその安定性 (2013)
  • Author(s): 伊藤淳、中島徳嘉
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学（徳島県徳島市）
• [Presentation] 拡張磁気流体モデルにおけるRayleigh-Taylor/Kelvin-Helmholtz不安定性の線形解析 (2013)
  • Author(s): 伊藤淳
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学（広島県東広島市）
• [Presentation] Eigenmode analysis of Rayleigh-Taylor and Kelvin-Helmholtz instabilities in the extended MHD model (2013)
  • Author(s): Atsushi Ito
  • Organizer: 2013 International Sherwood Fusion Theory Conference
  • Place of Presentation: La Fonda on the Plaza, Santa Fe （米国）
• [Presentation] Eigenmode analysis of Kelvin-Helmholtz/Rayleigh-Taylor instability based on the extended MHD model (2012)
  • Author(s): Atsushi Ito
  • Organizer: 22nd International Toki Conference
  • Place of Presentation: セラトピア土岐（岐阜県土岐市）
• [Presentation] 磁化プラズマにおけるRayleigh-Taylor/Kelvin-Helmholtz不安定性に対する微視的効果の線形固有モード解析 (2012)
  • Author(s): 伊藤淳
  • Organizer: 第２９回プラズマ・核融合学会年会
  • Place of Presentation: クローバープラザ（福岡県春日市）
• [Remarks] 研究者ホームページ
  • URL: http://www-fps.nifs.ac.jp/atsushi/index.html
• [Remarks] 研究者ホームページ
  • URL: http://www-fps.nifs.ac.jp/atsushi/index.html