Surfatron acceleration of a relativistic particle by electromagnetic plane wave

Details Surfatron acceleration of a relativistic particle by electromagnetic plane wave Surfatron acceleration of a relativistic particle by electromagnetic plane wave

2010-11-09

arxiv.org/abs/1011.2236v1

Physics

Plasma Physics

21 pages, 6 figures

Scientific paper

We study motion of a relativistic charged particle in a plane slow electromagnetic wave and background uniform magnetic field. The wave propagates normally to the background field. Under certain conditions, the resonance between the wave and the Larmor motion of the particle is possible. Capture into this resonance results in acceleration of the particle along the wave front (surfatron acceleration). We analyse the phenomenon of capture and show that a captured particle never leaves the resonance and its energy infinitely grows. Scattering on the resonance is also studied. We find that this scattering results in diffusive growth of the particle energy. Finally, we estimate energy losses due to radiation by an accelerated particle.

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