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Релятивістські лазер-плазма взаємодії. Солітони, що рухаються в каналах плазми, і кінетичне дисперсійне співвідношення для черенковського випромінювання

Релятивістські лазер-плазма взаємодії. Солітони, що рухаються в каналах плазми, і кінетичне дисперсійне співвідношення для черенковського випромінювання

The propagation of an intense laser beam in a preformed plasma channel is studied.&nbsp;Considering a propagating Gaussian laser pulse in a relativistic plasma channel which has&nbsp;a parabolic density profile, the evolution equation of the laser spot size is derived analytically&nbsp;a...

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Bibliographic Details
Main Author: Heidari, E.
Format: Article
Language:English
Published: Publishing house "Academperiodika" 2018
Subjects:
плазмові канали
солітони
релятивістська плазма
випромінювання Черенкова
plasma channels
solitons
relativistic plasma
Cherenkov radiation
Online Access:https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018234
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Summary:The propagation of an intense laser beam in a preformed plasma channel is studied.&nbsp;Considering a propagating Gaussian laser pulse in a relativistic plasma channel which has&nbsp;a parabolic density profile, the evolution equation of the laser spot size is derived analytically&nbsp;and solved numerically. The governing equation includes the effects of relativistic corrections&nbsp;to the ponderomotive self-channeling, preformed channel focusing, and self-focusing. In order&nbsp;to investigate the conditions for the existence of electromagnetic solitary waves, the solutions&nbsp;of the evolution equation for the laser spot size are discussed in terms of a relativistic effective&nbsp;potential. Some solitary wave solutions are illustrated numerically. The relativistic corrections&nbsp;to the dispersion relation of Cherenkov emission in dusty plasma is presented briefly. In the&nbsp;low-velocity limit, all the expressions in the present study are reduced to their associated counterparts&nbsp;in the nonrelativistic regime, as should be.

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