Model of electron pressure anisotropy in the electron diffusion region of collisionless magnetic reconnection

Тип публикации: статья из журнала

Год издания: 2010

Идентификатор DOI: 10.1063/1.3521576

Ключевые слова: Analytical results, Antiparallel configuration, Collisionless, Electron diffusion, Electron population, Electron pressures, Magnetic reconnections, Neutral line, New model, Particle-in-cell simulations, Two particles, Anisotropy, Astrophysics, Collisionless plasmas, Computer simulation, Diffusion, Geophysics, Magnetic fields, Magnetic properties, Plasma simulation, Electrons

Аннотация: A new model of the electron pressure anisotropy in the electron diffusion region in collisionless magnetic reconnection is presented for the case of antiparallel configuration of magnetic fields. The plasma anisotropy is investigated as source of collisionless dissipation. By separating electrons in the vicinity of the neutral line into two broad classes of inflowing and accelerating populations, it is possible to derive a simple closure for the off-diagonal electron pressure component. The appearance of these two electron populations near the neutral line is responsible for the anisotropy and collisionless dissipation in the magnetic reconnection. Particle-in-cell simulations verify the proposed model, confirming first the presence of two particle populations and second the analytical results for the off-diagonal electron pressure component. Furthermore, test-particle calculations are performed to compare our approach with the model of electron pressure anisotropy in the inner electron diffusion region by Fujimoto and Sydora [Phys. Plasmas 16, 112309 (2009)]. (C) 2010 American Institute of Physics. [doi:10.1063/1.3521576]

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Выпуск журнала: Vol. 17, Is. 12

ISSN журнала: 1070664X

Место издания: MELVILLE



  • Divin A. (Centrum voor Plasma-astrofysica,Katholieke Universiteit Leuven)
  • Markidis S. (Centrum voor Plasma-astrofysica,Katholieke Universiteit Leuven)
  • Lapenta G. (Centrum voor Plasma-astrofysica,Katholieke Universiteit Leuven)
  • Semenov V.S. (Department of Physics,St. Petersburg State University)
  • Erkaev N.V. (Siberian Federal University)
  • Biernat H.K. (Institute of Physics,University of Graz)

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