| Issue |
EPL
Volume 85, Number 2, January 2009
|
|
|---|---|---|
| Article Number | 25003 | |
| Number of page(s) | 4 | |
| Section | Physics of Gases, Plasmas and Electric Discharges | |
| DOI | https://doi.org/10.1209/0295-5075/85/25003 | |
| Published online | 22 January 2009 | |
Mode conversion of large-amplitude electromagnetic waves in relativistic critical density plasmas
Institute of Theoretical Physics A, RWTH Aachen University - Templergraben 55, 52056 Aachen, Germany, EU
Corresponding authors: pesch@ilt-extern.fraunhofer.de kull@ilt-extern.fraunhofer.de
Received:
14
November
2008
Accepted:
18
December
2008
The propagation of linearly polarized large-amplitude electromagnetic waves in critical density plasmas is studied in the framework of the Akiezer-Polovin model. A new mechanism of mode conversion is presented. The well-known periodic solutions are generalized to quasiperiodic solutions taking into account additional electrostatic oscillations. Nearly periodic circle-like solutions are found to be stabilized by intrinsic mode coupling whereas for nearly periodic eight-like solutions an effective mode conversion mechanism is discovered. Finally, the modulation timescales are considered.
PACS: 52.27.Ny – Relativistic plasmas / 52.38.-r – Laser-plasma interactions / 52.35.Mw – Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.)
© EPLA, 2009
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