| Issue |
Europhys. Lett.
Volume 43, Number 6, September II 1998
|
|
|---|---|---|
| Page(s) | 677 - 682 | |
| Section | Physics of gases, plasmas, and electrical discharges | |
| DOI | https://doi.org/10.1209/epl/i1998-00416-x | |
| Published online | 01 September 2002 | |
Relativistic two-plasmon excitation by a laser near the critical layer in a plasma
1
Physics Department, Samrat Ashok Technological Institute, Vidisha (MP) 464001, India
2
Center for Energy Studies, Indian Institute of Technology - New Delhi, 110016, India
Received:
6
October
1998
Accepted:
24
July
1998
An intense laser incident on a plasma relativistically
modulates the electron mass at the second harmonic. Near the critical
layer, the oscillatory mass couples two oppositely propagating
Langmuir waves which grow at a rate 
, where 
is the plasma frequency, v0
is the oscillatory electron velocity and c is the velocity of light
in vacuum. The decay is accompanied by the excitation of a
low-frequency mode which at large wave number 
enhances the growth rate of the two-plasmon process.
PACS: 52.40.Nk – Laser-plasma interactions (e.g., anomalous absorption, backscattering, magnetic field generation, fast particle generation) / 52.35.Mw – Nonlinear waves and nonlinear wave propagation (including parametric effects, mode coupling, ponderomotive effects, etc.)
© EDP Sciences, 1998
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