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Phase speed of electrostatic waves : the critical parameter for efficient electron surfing acceleration
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Dieckmann, M. E., Sircombe, Nathan John, Parviainen, M, Shukla, P. K. and Dendy, R. O. (2006) Phase speed of electrostatic waves : the critical parameter for efficient electron surfing acceleration. Plasma Physics and Controlled Fusion, Volume 48 (Number 4). pp. 489-508. doi:10.1088/0741-3335/48/4/002 ISSN 0741-3335.
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Official URL: http://dx.doi.org/10.1088/0741-3335/48/4/002
Abstract
Particle acceleration by means of nonlinear plasma wave interactions is of great topical interest. Accordingly, in this paper we focus on the electron surfing process. Self-consistent kinetic simulations, using both relativistic Vlasov and particle-in-cell (PIC) approaches, show here that electrons can be accelerated to highly relativistic energies (up to 100m(e)c(2)) if the phase speed of the electrostatic wave is mildly relativistic (0.6c to 0.9c for the magnetic field strengths considered). The acceleration is strong because of relativistic stabilization of the nonlinearly saturated electrostatic wave, seen in both relativistic Vlasov and PIC simulations. An inverse power law momentum distribution can arise for the most strongly accelerated electrons. These results are. of relevance to observed rapid changes in the radio synchrotron emission intensities from microquasars, gamma ray bursts and other astrophysical objects that require rapid acceleration mechanisms for electrons.
| Item Type: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
| Journal or Publication Title: | Plasma Physics and Controlled Fusion | ||||||
| Publisher: | Institute of Physics Publishing Ltd. | ||||||
| ISSN: | 0741-3335 | ||||||
| Official Date: | 6 March 2006 | ||||||
| Dates: |
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| Volume: | Volume 48 | ||||||
| Number: | Number 4 | ||||||
| Number of Pages: | 20 | ||||||
| Page Range: | pp. 489-508 | ||||||
| DOI: | 10.1088/0741-3335/48/4/002 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||
| Adapted As: |
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