Particle Energization in an Expanding Magnetized Relativistic Plasma

Details Particle Energization in an Expanding Magnetized Relativistic Plasma Particle Energization in an Expanding Magnetized Relativistic Plasma

2003-01-16

arxiv.org/abs/astro-ph/0301330v1

Phys.Rev.Lett.90:085001,2003

Astronomy and Astrophysics

Astrophysics

7 pages text plus 5 figures, accepted for publication by Physical Review Letters

Scientific paper

10.1103/PhysRevLett.90.085001

Using a 2-1/2-dimensional particle-in-cell (PIC) code to simulate the relativistic expansion of a magnetized collisionless plasma into a vacuum, we report a new mechanism in which the magnetic energy is efficiently converted into the directed kinetic energy of a small fraction of surface particles. We study this mechanism for both electron-positron and electron-ion (mi/me=100, me is the electron rest mass) plasmas. For the electron-positron case the pairs can be accelerated to ultra-relativistic energies. For electron-ion plasmas most of the energy gain goes to the ions.

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