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Particle Acceleration by Relativistic Expansion of Magnetic Arcades

H. Takahashi, E. Asano, R. Matsumoto Chiba Unv. Japan. Particle Acceleration by Relativistic Expansion of Magnetic Arcades. shock. current sheet. Asano et al. (P12). Simulation Model of Particle Accelerations. 2-dim. Paritcle-In-Cell (PIC) simulation

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Particle Acceleration by Relativistic Expansion of Magnetic Arcades

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  1. H. Takahashi, E. Asano, R. Matsumoto Chiba Unv. Japan Particle Acceleration by Relativistic Expansion of Magnetic Arcades shock current sheet Asano et al. (P12)

  2. Simulation Model of Particle Accelerations 2-dim. Paritcle-In-Cell (PIC) simulation • Mikic Model extended into relativistic plasma • (NX,NY)=(200,1600) Assumption • elecron-positron plasma • collisionless • Plasma density is slightly larger than Goldreich-Julian density Initial Model constructed by Mikic(‘88) Bz : toroidal components Bx,By: poloidal components

  3. 2.5-dimensional PIC Simulation: Result Tg=90.0 Tg=237.5 color: Bz line: field line color: density line: field line color: Bz line: field line ExB drift motion leads to charge deficiency in the arcades. Magnetic reconnections take place inside the expanding arcades.

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