Three-Dimensional Particle Acceleration in Electromagnetic Cylinder and Torus |
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Authors: | Koichi Noguchi Edison Liang |
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Institution: | (1) Rice University, Houston, TX 77005–1892, USA |
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Abstract: | Particle acceleration via Poynting vector with toroidal magnetic field is studied in 3D PIC simulation of electron-positron
plasma. We choose two different initial magnetic field configurations to compare how the particle acceleration is affected
by the expansion of electromagnetic wave. In the cylindrical case, the electromagnetic field strength decays as (ct)−2, and particles are accelerated in the radial direction as well as the axial direction. Rayleigh-Taylor instability is also
observed at the center of the cylinder. In the torus case, the field strength decays as (ct)−3, making the acceleration less efficient. Particles accelerated in the axial direction by E × B force creates strong charge separation. |
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Keywords: | Gamma ray bursts Collapsars PIC Numerical Relativity |
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