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Relativistic longitudinal self-compression of ultra-intense Gaussian laser pulses in magnetized plasma

Published online by Cambridge University Press:  19 August 2020

Gunjan Purohit Open the ORCID record for Gunjan Purohit [Opens in a new window] ,
Priyanka Rawat ,
Pradeep Kothiyal  and
Ramesh Kumar Sharma
Gunjan Purohit*
Affiliation:
Laser Plasma Computational Laboratory, Department of Physics, DAV (PG) College, Dehradun, Uttarakhand248001, India
Priyanka Rawat
Affiliation:
Laser Plasma Computational Laboratory, Department of Physics, DAV (PG) College, Dehradun, Uttarakhand248001, India
Pradeep Kothiyal
Affiliation:
Department of Mathematics, DAV (PG) College, Dehradun, Uttarakhand248001, India
Ramesh Kumar Sharma
Affiliation:
Laser Plasma Computational Laboratory, Department of Physics, DAV (PG) College, Dehradun, Uttarakhand248001, India
*
Author for correspondence: G. Purohit, Laser Plasma Computational Laboratory, Department of Physics, DAV (PG) College, Dehradun, Uttarakhand 248001, India. E-mail: purohit_gunjan@yahoo.com
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Abstract

This article presents a preliminary study of the longitudinal self-compression of ultra-intense Gaussian laser pulse in a magnetized plasma, when relativistic nonlinearity is active. This study has been carried out in 1D geometry under a nonlinear Schrodinger equation and higher-order paraxial (nonparaxial) approximation. The nonlinear differential equations for self-compression and self-focusing have been derived and solved by the analytical and numerical methods. The dielectric function and the eikonal have been expanded up to the fourth power of r (radial distance). The effect of initial parameters, namely incident laser intensity, magnetic field, and initial pulse duration on the compression of a relativistic Gaussian laser pulse have been explored. The results are compared with paraxial-ray approximation. It is found that the compression of pulse and pulse intensity of the compressed pulse is significantly enhanced in the nonparaxial region. It is observed that the compression of the high-intensity laser pulse depends on the intensity of laser beam (a0), magnetic field (ωc), and initial pulse width (τ0). The preliminary results show that the pulse is more compressed by increasing the values of a0, ωc, and τ0.

Keywords

Higher-order paraxial theorymagnetized plasmarelativistic nonlinearityself-compression
Type
Research Article
Information
Laser and Particle Beams , Volume 38 , Issue 3 , September 2020 , pp. 188 - 196
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Copyright
Copyright © The Author(s) 2020. Published by Cambridge University Press

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