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Formation of Plasma Structure by Cross-Field Particle Acceleration and Potential Formation

Research Project

Project/Area Number 16540449
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

SUGAYA Reiji  Ehime University, Faculty of Science, Professor, 理学部, 教授 (30036397)

Project Period (FY) 2004 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 2005: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2004: ¥1,000,000 (Direct Cost: ¥1,000,000)
KeywordsMagnetized plasma / Nonlinear plasma wave / Cross-field particle acceleration / Dynamo effect / Potential formation / Plasma transport / Turbulent diffusion / Plasma structure formation
Research Abstract

I.The numerical analysis of the plasma structure formation was performed as follows :
(1)The magnetohydrodynamic equations incorporating the transport equations and the anomalous diffusion due to the turbulent plasma wave are solved numerically on the basis of the three-dimensional modeling. The transport equations show the cross-field acceleration and heating of plasma electrons. The temporal evolution of the three-dimensional profiles of the cross-field electric field, the drift velocity of plasma electrons and the electron temperature and density was clarified in detail.
(2)It was verified that the parallel and perpendicular electron transport generates a large and abrupt dip of the electron density and a strong peak of the electron temperature in the radial direction. At the same time the cross-field electric field is produced partially by the cross-field electron transport and partially by the perpendicular pressure gradient, that is, it is given by the generalized Ohm's law E_⊥ = B … More _O x v_<e⊥>/ c - (*_⊥p_e ) / en_e (p_e = n_ek_BT_e). Namely it was proved that the electron heating region like the electron hole is created by the cross-field transport of plasma electrons (J.Plasma Fusion Res.SERIES, Vol.6, pp.253-255 (2004)).
(3)The large amplitude electrostatic waves generate the turbulent diffusion across the magnetic field. This anomalous diffusion of plasma electrons into the central region of the plasma competes with the cross-field electron transport. It was shown that the electron heating region like the electron hole vanishes finally via this turbulent diffusion. The obtained results agree with the experimental observation qualitatively and quantitatively.
(4)It was found that this method of the numerical analysis of the electron transport in the electron beam-plasma system is available to the theoretical study of the formation of the transport barrier in a fusion plasma.
II.It was verified theoretically and numerically that the relativistic electron beam with the energy lower than 1 GeV can be accelerated efficiently via the Compton scattering of the extraordinary wave in the magnetized plasma (J.Plasma Phys.Vol.70, Part3, pp.331-357 (2004))
III.It was verified theoretically and numerically that the relativistic electron beam with the energy lower than 5 TeV can be accelerated efficiently via the Compton scattering of the lower-hybrid wave in the magnetized plasma (Phys.Plasmas Vol.12, pp.5634-5642 (2004) ; 2004 ICPP, Nice, P2-047 (2004)). Less

Report

(3 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • Research Products

    (10 results)

All 2004

All Journal Article (10 results)

  • [Journal Article] Cross-Field Electron Transport and Dynamo Effect Induced by Unstable Localized Electrostatic Waves in a Magnetized Plasma2004

    • Author(s)
      R.Sugaya, T.Maehara, M.Sugawa
    • Journal Title

      Journal of Plasma and Fusion Research SERIES Vol. 6

      Pages: 253-255

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Relativistic electron beam acceleration by nonlinear Landau damping of electrostatic waves in a magnetized plasma2004

    • Author(s)
      R.Sugaya
    • Journal Title

      Physics of Plasmas Vol. 11, No. 12

      Pages: 5634-5642

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Electron beam acceleration and potential formation induced by the Compton scattering of extraordinary waves2004

    • Author(s)
      R.Sugaya
    • Journal Title

      Journal of Plasma Physics Vol. 70, Part 3

      Pages: 331-357

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Relativistic Electron Beam Acceleration by Compton Scattering of Lower-Hybrid Waves2004

    • Author(s)
      R.Sugaya, T.Maehara, M.Sugawa
    • Journal Title

      Proceedings of 12th International Conference on Plasma Physics, Nice, France P2-047

      Pages: 1-4

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Cross-Field Electron Transport and Dynamo Effect Induced by Unstable Localized Electrostatic Waves in a Magnetized Plasma2004

    • Author(s)
      R.Sugaya, T.Maehara, M.Sugawa
    • Journal Title

      Journal of Plasma and Fusion Research SERIES Vol.6

      Pages: 253-255

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Relativistic electron beam acceleration by nonlinear Landau damping of electrostatic waves in a magnetized plasma2004

    • Author(s)
      R.Sugaya
    • Journal Title

      Physics of Plasma Vol.11,Number12

      Pages: 5634-5642

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Electron beam acceleration and potential formation induced by the Compton scattering of extraordinary waves2004

    • Author(s)
      R.Sugaya
    • Journal Title

      Journal of Plasma Physics Vol;70,Part3

      Pages: 331-357

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Relativistic Electron Beam Acceleration by Compton Scattering of Lower-Hybrid Waves2004

    • Author(s)
      R.Sugaya, T.Maehara, M.Sugaya
    • Journal Title

      Proceedings of 12th International Conference on Plasma Physics Nice, France P02-047

      Pages: 1-4

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Electron beam acceleration and potential formation induced by the Compton scattering of extraordinary waves2004

    • Author(s)
      R.Sugaya
    • Journal Title

      Journal of Plasma Physics Vol.70, Part 3

      Pages: 331-357

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Relativistic electron beam acceleration by nonlinear Landau Damping of electrostatic waves in a magnetized plasma2004

    • Author(s)
      R.Sugaya
    • Journal Title

      Physics of Plasmas Vol.11, No.12

      Pages: 5634-5642

    • Related Report
      2004 Annual Research Report

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Published: 2004-04-01   Modified: 2016-04-21  

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