Journal article
Stability of relativistic surfatron acceleration
Physical review. E, Statistical, nonlinear, and soft matter physics, v 89(4), pp 043106-043106
18 Apr 2014
PMID: 24827354
Abstract
In this paper we consider the surfatron acceleration of relativistic charged particles by a strong electrostatic wave propagating in a transverse direction relative to the background magnetic field. We investigate how high-frequency fluctuations of the background magnetic field affect the process of the resonant acceleration. We show that the presence of fluctuations leads to particle escape from the surfatron resonance and illustrate that fluctuations of different components of the magnetic field have quite a distinct effect on the energy gained by particles. In the case of the same power density, the strongest effect corresponds to fluctuations of the component directed along the background magnetic field, while the effect of the component along the wave front is substantially weaker. This is more important for particles with a large velocity component along the background magnetic field. We demonstrate that the dynamics of particles can statistically be described in terms of the adiabatic invariant diffusion. We derive the corresponding diffusion equation and compare solutions of that equation with results obtained by the explicit particle tracing.
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Details
- Title
- Stability of relativistic surfatron acceleration
- Creators
- Anton Artemyev - Space Res Inst, Moscow, RussiaDmitri Vainchtein - Space Research InstituteAnatoly Neishtadt - Loughborough UniversityLev Zelenyi - Space Research Institute
- Publication Details
- Physical review. E, Statistical, nonlinear, and soft matter physics, v 89(4), pp 043106-043106
- Publisher
- Amer Physical Soc
- Number of pages
- 11
- Grant note
- 13-01-00251 / RFBR; Russian Foundation for Basic Research (RFBR) OFN-15 / Russian Academy of Science; Russian Academy of Sciences NSh-2519.2012.1 / Grants for State Support of Leading Scientific Schools
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- C. and J. Nyheim Plasma Institute
- Web of Science ID
- WOS:000335239200011
- Scopus ID
- 2-s2.0-84899756078
- Other Identifier
- 991021861621604721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Physics, Fluids & Plasmas
- Physics, Mathematical