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2010 Fiscal Year Final Research Report

Field structure of large-amplitude magnetohydrodynamic waves and associated ultrarelativistic particle acceleration

Research Project

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Project/Area Number 20540481
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Plasma science
Research InstitutionNagoya University

Principal Investigator

OHSAWA Yukiharu  Nagoya University, 大学院・理学研究科, 教授 (10115537)

Project Period (FY) 2008 – 2010
Keywordsプラズマ物理 / 粒子加速 / 無衝突衝撃波 / 粒子シミュレーション / 磁気流体波
Research Abstract

In the ideal magnetohydrodynamics, the electric field parallel to the magnetic field is exactly zero, and it was generally thought that the parallel electric field was quite weak in low-frequency, long-wavelength phenomena in a collisionless plasma. We have found, however, that the parallel electric field can be quite strong in nonlinear magnetosonic waves : We have analytically obtained the parallel electric field in nonlinear magnetosonic waves and have quantitatively confirmed the theoretical prediction with relativistic, fully kinetic, fully electromagnetic particle simulations.
We have also numerically studied the evolution of magnetohydrodynamic waves arising from a strong disturbance given to a collisionless plasma. Simulations show that large-amplitude Alfven waves are generated behind magnetosonic shock fronts. Furthermore, ultrarelativistic electron acceleration can occur in the Alfven wave region. These mechanisms have been theoretically analyzed in detail.

  • Research Products

    (51 results)

All 2011 2010 2009 2008 Other

All Journal Article (19 results) (of which Peer Reviewed: 12 results) Presentation (30 results) Book (1 results) Remarks (1 results)

  • [Journal Article] Effect of Magnetic-Field Gradient on Positron Acceleration along the Magnetic Field in an Oblique Shock Wave2011

    • Author(s)
      T.Iwata, S.Takahashi, Y.Ohsawa
    • Journal Title

      Plasma and Fusion Research Vol.6

      Pages: 2401025

    • Peer Reviewed
  • [Journal Article] Particle acceleration and parallel electric field in shock waves2010

    • Author(s)
      H.Kawai, S.Takahashi, Y.Ohsawa, S.Usami, C.Chiu, W.Horton
    • Journal Title

      J.Plasma Fusion Res.Series Vol.9

      Pages: 393-397

    • Peer Reviewed
  • [Journal Article] 無衝突衝撃波の強力な電磁場による超相対論的粒子加速2010

    • Author(s)
      大澤幸治
    • Journal Title

      日本物理学会誌 Vol.65

      Pages: 945-952

  • [Journal Article] Simulation Studies of Electron Acceleration to Ultrarelativistic Energies Caused by Small Pulses Generated in Shock Waves2010

    • Author(s)
      M.Sato, Y.Ohsawa
    • Journal Title

      J.Plasma Fusion Res.Series Vol.9

      Pages: 242-245

    • Peer Reviewed
  • [Journal Article] Repeated Interactions of Thermal Ions with an Oblique Shock Wave2010

    • Author(s)
      M.Toida, R.Honma, Y.Ohsawa
    • Journal Title

      Vol.9

      Pages: 242-245

    • Peer Reviewed
  • [Journal Article] Numerical studies on ultra-relativistic ion Motions in an oblique magnetosonic shock Wave2009

    • Author(s)
      S.Usami, R.Horiuchi, Y.Ohsawa
    • Journal Title

      Phys.Plasmas Vol.16

      Pages: 122104

    • Peer Reviewed
  • [Journal Article] The effect of parallel electric field in shock waves on the acceleration of relativistic ions, electrons, and positrons2009

    • Author(s)
      S.Takahashi, H.Kawai, Y.Ohsawa, S.Usami, C.Chiu, W.Horton
    • Journal Title

      Phys.Plasmas Vol.16

      Pages: 112308

    • Peer Reviewed
  • [Journal Article] Parametric Studies of High-and Low-Frequency Magnetosonic Waves and Ion Acceleration2009

    • Author(s)
      M.Toida, H.Higashino, Y.Ohsawa
    • Journal Title

      J.Plasma Fusion Res.Series Vol.8

      Pages: 826-830

    • Peer Reviewed
  • [Journal Article] Effect of ion composition on ion acceleration by magnetosonic shock waves2008

    • Author(s)
      M.Toida, H.Higashino, Y.Ohsawa
    • Journal Title

      Phys.Plasmas Vol.15

      Pages: 092305

    • Peer Reviewed
  • [Journal Article] Parallel electric fields in nonlinear magnetosonic waves in an electron-positron-ion plasma2008

    • Author(s)
      S.Takahashi, M.Sato, Y.Ohsawa
    • Journal Title

      Phys.Plasmas Vol.15

      Pages: 082309

    • Peer Reviewed
  • [Journal Article] Detrapping of energetic electrons from curved shock front2008

    • Author(s)
      M.Toida, M.Ueno, Y.Ohsawa
    • Journal Title

      J.Phys.Soc.Japan Vol.77

      Pages: 084501

    • Peer Reviewed
  • [Journal Article] Evolution of magnetohydrodynamic waves and acceleration of particles in a collision of two plasmas2008

    • Author(s)
      M.Sato, Y.Ohsawa
    • Journal Title

      J.Phys.Soc.Japan Vol.77

      Pages: 084502

    • Peer Reviewed
  • [Journal Article] Shock formation in a collision of two plasmas with their relative velocity oblique to the magnetic field2008

    • Author(s)
      K.Yamauchi, Y.Ohsawa
    • Journal Title

      J.Phys.Soc.Japan Vol.77

      Pages: 054501

    • Peer Reviewed
  • [Journal Article] 陽電子加速:磁力線に平行な加速2008

    • Author(s)
      大澤幸治
    • Journal Title

      プラズマ・核融合学会誌 Vol.84

      Pages: 828-833

  • [Journal Article] 重イオン加速2008

    • Author(s)
      大澤幸治
    • Journal Title

      プラズマ・核融合学会誌 Vol.84

      Pages: 822-827

  • [Journal Article] 反射によるイオン加速と高速イオンの多段加速2008

    • Author(s)
      大澤幸治
    • Journal Title

      プラズマ・核融合学会誌 Vol.84

      Pages: 705-710

  • [Journal Article] 小パルスによる電子加速2008

    • Author(s)
      大澤幸治
    • Journal Title

      プラズマ・核融合学会誌 Vol.84

      Pages: 699-704

  • [Journal Article] 捕捉電子の超相対論的加速2008

    • Author(s)
      大澤幸治
    • Journal Title

      プラズマ・核融合学会誌 Vol.84

      Pages: 589-593

  • [Journal Article] 衝撃波による粒子加速:宇宙プラズマにおける粒子加速と無衝突衝撃波の概観2008

    • Author(s)
      大澤幸治
    • Journal Title

      プラズマ・核融合学会誌 Vol.84

      Pages: 583-588

  • [Presentation] 非線形磁気音波における磁力線方向の電場2011

    • Author(s)
      高橋聖一、大澤幸治
    • Organizer
      STEシミュレーション研究会・STPシミュレーション技法勉強会
    • Place of Presentation
      九州大学
    • Year and Date
      2011-03-01
  • [Presentation] Electron acceleration in Alfven waves behind magnetosonic shock waves2010

    • Author(s)
      竹山洋右, 中山俊一, 大澤幸治
    • Organizer
      20th International Toki Conference (ITC20) on Advanced Physics in Plasma and Fusion Research
    • Place of Presentation
      Ceratopia Toki, Toki-City, Gifu, Japan
    • Year and Date
      20101207-20101210
  • [Presentation] Effect of Magnetic-Field Gradient on Positron Acceleration along the Magnetic Field in an Oblique Shock Wave2010

    • Author(s)
      T.Iwata, S. Takahashi, Y.Ohsawa
    • Organizer
      20th International Toki Conference (ITC-20) on The Next Twenty Years in Plasma and Fusion Science
    • Place of Presentation
      Ceratopia Toki, Toki-City, Gifu, Japan
    • Year and Date
      20101207-20101210
  • [Presentation] Parallel Electric Field and Particle Acceleration in Oblique Magnetosonic Shock Waves2010

    • Author(s)
      高橋聖一, 大澤幸治
    • Organizer
      52nd Annual Meeting of the Division of Plasma Physics of the American Physical Society
    • Place of Presentation
      Chicago, IL
    • Year and Date
      20101108-20101112
  • [Presentation] 磁気音波衝撃後部に形成されるアルヴェン波束による電子加速22010

    • Author(s)
      竹山洋右、大澤幸治
    • Organizer
      日本物理学会
    • Place of Presentation
      大阪府立大学
    • Year and Date
      2010-09-24
  • [Presentation] 陽電子加速における磁場勾配の効果2010

    • Author(s)
      高橋聖一、大澤幸治
    • Organizer
      プラズマ科学のフロンティア2010研究会
    • Place of Presentation
      核融合科学研究所
    • Year and Date
      2010-09-02
  • [Presentation] 非線形磁気音波中の沿磁力線電場と粒子加速2010

    • Author(s)
      高橋聖一、河合洋将、大澤幸治、宇佐見俊介、Charles Chiu、Wendell Horton
    • Organizer
      2010年日本地球惑星科学連合大会
    • Place of Presentation
      千葉幕張メッセ国際会議場
    • Year and Date
      2010-05-23
  • [Presentation] 磁気音波衝撃波後部に形成されるアルヴェン波束による電子加速2010

    • Author(s)
      中山俊一、大澤幸治、竹山洋右
    • Organizer
      日本物理学会
    • Place of Presentation
      岡山大学
    • Year and Date
      2010-03-23
  • [Presentation] Electric field component parallel to the magnetic field in nonlinear magnetosonic waves2009

    • Author(s)
      高橋聖一, 大澤幸治
    • Organizer
      19th International Toki Conference (ITC19) on Advanced Physics in Plasma and Fusion Research
    • Place of Presentation
      Ceratopia Toki, Toki-City, Gifu, Japan
    • Year and Date
      20091208-20091211
  • [Presentation] Parallel Electric Field in Nonlinear Magnetosonic Waves in Two-and Three-Component Plasmas2009

    • Author(s)
      高橋聖一, 大澤幸治
    • Organizer
      51st American Physical Society Annual Meeting of the Division of Plasma Physics
    • Place of Presentation
      Atlanta, GA
    • Year and Date
      20091102-20091106
  • [Presentation] Particle acceleration and parallel electric field in shock waves2009

    • Author(s)
      H.Kawai, S.Takahashi, Y.Ohsawa S, S.Usami, C.Chiu, W.Horton
    • Organizer
      The 7th General Scientific Assembly of the Asia Plasma and Fusion Association (APFA2009) and the Asia-Pacific Plasma Theory Conference (APPTC2009)
    • Place of Presentation
      Aomori, Japan
    • Year and Date
      20091027-20091030
  • [Presentation] 無衝突衝撃波と粒子加速2009

    • Author(s)
      大澤幸治
    • Organizer
      日本物理学会
    • Place of Presentation
      熊本大学(招待講演)
    • Year and Date
      2009-09-27
  • [Presentation] 衝撃波中の捕捉電子の加速に対する平行電場の効果12009

    • Author(s)
      大澤幸治、高橋聖一、河合洋将、C.Chiu、W.Horton
    • Organizer
      日本物理学会
    • Place of Presentation
      熊本大学
    • Year and Date
      2009-09-27
  • [Presentation] 衝撃波中の捕捉電子の加速に対する平行電場の効果22009

    • Author(s)
      河合洋将、高橋聖一、大澤幸治、C.Chiu、W.Horton
    • Organizer
      日本物理学会
    • Place of Presentation
      熊本大学
    • Year and Date
      2009-09-27
  • [Presentation] 陽電子加速における磁場勾配の効果2009

    • Author(s)
      高橋聖一、大澤幸治
    • Organizer
      日本物理学会
    • Place of Presentation
      熊本大学
    • Year and Date
      2009-09-27
  • [Presentation] 2成分及び3成分プラズマ中の非線形磁気音波における磁力線方向の電場2009

    • Author(s)
      高橋聖一、大澤幸治
    • Organizer
      プラズマ科学のフロンティア2009研究会
    • Place of Presentation
      核融合科学研究所
    • Year and Date
      2009-09-04
  • [Presentation] Parallel Electric Field and Particle Acceleration in Shock Waves2009

    • Author(s)
      大澤幸治
    • Organizer
      Invited Seminar at the Institute for Fusion Studies
    • Place of Presentation
      The University of Texas at Austin
    • Year and Date
      2009-08-11
  • [Presentation] 衝撃波における粒子加速に対する平行電場の効果22009

    • Author(s)
      河合洋将、高橋聖一、大澤幸治、C.Chiu, W.Horton
    • Organizer
      日本物理学会
    • Place of Presentation
      立教学院
    • Year and Date
      2009-03-29
  • [Presentation] 衝撃波における粒子加速に対する平行電場の効果12009

    • Author(s)
      大澤幸治、河合洋将、高橋聖一、C.Chiu、W.Horton
    • Organizer
      日本物理学会
    • Place of Presentation
      立教学院
    • Year and Date
      2009-03-29
  • [Presentation] 2成分及び3成分プラズマ中の非線形磁気音波における磁力線方向の電場2009

    • Author(s)
      高橋聖一、佐藤正俊、大澤幸治
    • Organizer
      日本物理学会
    • Place of Presentation
      立教学院
    • Year and Date
      2009-03-28
  • [Presentation] 衝撃波中の小パルスによって引き起こされる電子加速2009

    • Author(s)
      佐藤正俊、大澤幸治
    • Organizer
      STE研・NICT合同シミュレーション研究会
    • Place of Presentation
      名古屋大学
    • Year and Date
      2009-01-31
  • [Presentation] Parametric Studies of High-and Low-Frequency Magnetosonic Waves and Ion Acceleration2008

    • Author(s)
      M.Toida, H.Higashino, Y.Ohsawa
    • Organizer
      International Congress on Plasma Physics 2008
    • Place of Presentation
      Fukuoka, Kyushu
    • Year and Date
      20080908-20080912
  • [Presentation] Repeated Interactions of Thermal Ions with an Oblique Shock Wave2008

    • Author(s)
      樋田美栄子, 本間亮平, 大澤幸治
    • Organizer
      International Congress on Plasma Physics 2008
    • Place of Presentation
      Fukuoka, Kyushu
    • Year and Date
      20080908-20080912
  • [Presentation] Simulation Studies of Electron Acceleration to Ultrarelativistic Energies Caused by Small Pulses Generated in Shock Waves2008

    • Author(s)
      佐藤正俊, 大澤幸治
    • Organizer
      International Congress on Plasma Physics 2008
    • Place of Presentation
      Fukuoka, Kyushu
    • Year and Date
      20080908-20080912
  • [Presentation] Theory and Simulations of Parallel Electric Fields in Nonlinear Magnetosonic Waves : Three-Component Plasma2008

    • Author(s)
      高橋聖一, 大澤幸治
    • Organizer
      International Congress on Plasma Physics 2008
    • Place of Presentation
      Fukuoka, Kyushu
    • Year and Date
      20080908-20080912
  • [Presentation] Theory and Simulations of Parallel Electric Fields in Nonlinear Magnetosonic Waves : Two-Component Plasma2008

    • Author(s)
      大澤幸治, 高橋聖一
    • Organizer
      International Congress on Plasma Physics 2008
    • Place of Presentation
      Fukuoka, Kyushu
    • Year and Date
      20080908-20080912
  • [Presentation] 衝撃波の沿磁力線電場と粒子加速2008

    • Author(s)
      大澤幸治、高橋聖一
    • Organizer
      宇宙関連プラズマ研究会2008
    • Place of Presentation
      JAXA(相模原市)
    • Year and Date
      2008-12-16
  • [Presentation] 磁気音波衝撃波における平行電場の非定常性2008

    • Author(s)
      高橋聖一、大澤幸治
    • Organizer
      日本物理学会
    • Place of Presentation
      岩手大学
    • Year and Date
      2008-09-23
  • [Presentation] 斜め衝撃波による熱的イオンの多段加速2008

    • Author(s)
      樋田美栄子、本間亮平、大澤幸治
    • Organizer
      日本物理学会
    • Place of Presentation
      岩手大学
    • Year and Date
      2008-09-23
  • [Presentation] 無衝突衝撃波と粒子加速のシミュレーション2008

    • Author(s)
      大澤幸治
    • Organizer
      日本物理学会
    • Place of Presentation
      岩手大学
    • Year and Date
      2008-09-22
  • [Book] 理工学基礎電磁気学2009

    • Author(s)
      大島隆義、大澤幸治、鈴村順三
    • Publisher
      培風館
  • [Remarks] ホームページ等

    • URL

      http://plab.phys.nagoya-u.ac.jp/member/ohsawa.html

URL: 

Published: 2012-01-26   Modified: 2016-04-21  

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