Self-induced transparency in an active plasma
- Rostov State Univ. (Russian Federation)
The study of problems associated with the effect of self-induced transparency is interesting in connection with the possibility of propagating isolated electromagnetic pulses in a gas of two-level atoms when the carrier frequency of the pulses is close to the transition frequency of an electron between the atomic levels. Recently there has been active study of involving the interaction of resonant neutral atoms with charged-particle beams and plasma waves. In the present work we solve the problem of the propagation of Langmuir pulses under conditions such that the dispersive spreading of a wave packet is negligible. It is assumed that the wave frequency {omega} is close to one of the characteristic frequencies of the molecular medium, so that we can use the two-level approximation to describe the nonlinear properties of the gas. A solution is found in the form of a solitary envelope wave, where we treat both the nonlinearity of the gaseous medium and the effect of electrostriction. In an active plasma Langmuir and electromagnetic waves can be coupled through their effect on the gaseous component. In this work we also treat the longitudinal-transverse oscillations in a plasma with a trace of neutral atoms. As the following analysis shows, in this case resonant longitudinal-transverse solitons can form. 7 refs.
- OSTI ID:
- 136458
- Journal Information:
- Plasma Physics Reports, Vol. 19, Issue 6; Other Information: PBD: Jun 1993; TN: Translated from Fiz. Plazmy.; 19, 826-831(Jun 1993)
- Country of Publication:
- United States
- Language:
- English
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