Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-04-27
Nuovo Cim.C28:381-386,2005
Astronomy and Astrophysics
Astrophysics
6pages, 4figures. Accepted for publication in Il nuovo cimento C
Scientific paper
10.1393/ncc/i2005-10065-9
We study the radiation damping effect on the relativistic acceleration of electron-positron plasmas with two-and-half-dimensional particle-in-cell (PIC) simulation. Particles are accelerated by Poynting flux via the diamagnetic relativistic pulse accelerator (DRPA), and decelerated by the self-consistently solved radiation damping force. With $\Omega_{ce}/\omega_{pe}\geq 10$, the Lorentz factor of the highest energy particles reaches gamma>100, and the acceleration still continues. The emitted radiation is peaked within few degrees from the direction of Poynting flux and strongly linearly polarized, which may be detectable in gamma-ray burst(GRB) observations. We also show that the DRPA is insensitive to the initial supporting currents.
Liang Edison
Nishimura Kazuhiko
Noguchi Koichi
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