Collisionless Magnetic Reconnection in the Presence of Initial Guide Field |
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| Institution: | 1. College of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026;2. Key Laboratory of Space Weather, Chinese Academy of Sciences;3. College of Mathematics and Physics, Qingdao University of Science and Technology;1. Department of Mathematics, University College London, Gower Street, London, WC1E 6BT, United Kingdom;2. Institut de Ciencies de lEspai (IEEC-CSIC), Campus UAB, Carrer de Can Magrans, s/n, 08193 Cerdanyola del Valles, Barcelona, Spain;3. ICREA, Passeig LluAs Companys, 23, 08010 Barcelona, Spain;4. Tomsk State Pedagogical University, 634061 Tomsk, Russia;5. Laboratory for Theoretical Cosmology, Tomsk State University of Control Systems and Radioelectronics (TUSUR), 634050 Tomsk, Russia;6. Joint Institute for Nuclear Research, Joliot-Curie 6, 141980 Dubna, Moscow region, Russia;7. Institute of Physics, Kazan Federal University, Kremlevskaya street 18, 420008 Kazan, Russia;1. Univ Lyon, Universite Lyon 1, CNRS/IN2P3, IPNL, F-69622, Villeurbanne, France;2. Centre for Cosmology, Particle Physics and Phenomenology (CP3), Universite catholique de Louvain, Chemin du Cyclotron 2, B-1348 Louvain-la-Neuve, Belgium;3. Center for Theoretical Physics of the Universe, Institute for Basic Science (IBS), Daejeon, 34051, Republic of Korea;1. Institute for Fundamental Physics of the Universe, Via Beirut 2, 34151 Trieste, Italy;2. SISSA - International School for Advanced Studies, Via Bonomea 265, 34136 Trieste, Italy;3. Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Trieste, via Tiepolo 11, 34143 Trieste, Italy;4. Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, via Valerio 2, 34127 Trieste, Italy;5. Département de Physique Théorique and Centre for Astroparticle Physics (CAP), Université de Genève, 24 quai E. Ansermet, CH-1211 Geneva, Switzerland;6. Dipartimento di Fisica, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185, Roma, Italy;7. Physics Division, National Technical University of Athens, 15780 Zografou Campus, Athens, Greece |
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| Abstract: | By using the method of 2-dimensional, 3-component full particle simulation, collisionless magnetic reconnection in the presence of various initial guide fields and the Harris current sheet with 1-dimensional initial state are studied. The results show that strong guide fields with Bz0 > 0.5B0 can evidently alter not only the trajectory of the particles, but also the structure of the electric and velocity fields in the vicinity of the reconnection region, thereby affecting the rate of reconnection and the acceleration of electrons. The generalized Ohm's law is employed to interpret the structural characteristics of the electric fields with various guide fields. Also, via the tracing of the electron beam near he diffusion region, it is revealed that in the 2-D model, for both strong and weak guide fields, the induced electric field perpendicular to the simulation plane at the center of the diffusion region plays the major role in the acceleration of electrons. The contribution of the planar electric field outside the diffusion region is very small. |
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