Effects of Higher-Order Relativistic Nonlinearity and Wakefield During a Moderately Intense Laser Pulse Propagation in a Plasma Channel

Using a variational approach, the propagation of a moderately intense laser pulse in a parabolic preformed plasma channel is investigated. The effects of higher-order relativistic nonlinearity (HRN) and wakefield are included. The effect of HRN serves as an additional defocusing mechanism and has th...

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Bibliographic Details
Published in:Communications in theoretical physics 2013-08, Vol.60 (2), p.222-226
Main Authors: Liu, Ming-Ping, Liu, Bing-Bing, Liu, San-Qiu, Zhang, Fu-Yang, Liu, Jie
Format: Article
Language:English
Subjects:
Channels
Defocusing
Lasers
Nonlinearity
Oscillations
Plasma (physics)
Pulse propagation
Spots
Wavelengths
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Summary:Using a variational approach, the propagation of a moderately intense laser pulse in a parabolic preformed plasma channel is investigated. The effects of higher-order relativistic nonlinearity (HRN) and wakefield are included. The effect of HRN serves as an additional defocusing mechanism and has the same order of magnitude in the spot size as that of the transverse wakefield (TWF). The effect of longitudinal wakefield is much larger than those of HRN and TWF for an intense laser pulse with the pulse length equaling the plasma wavelength. The catastrophic focusing of the laser spot size would be prevented in the present of HRN and then it varies with periodic focusing oscillations.
ISSN:0253-6102
1572-9494
DOI:10.1088/0253-6102/60/2/14