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Title: Relativistic laser pulse compression in magnetized plasmas

Abstract

The self-compression of a weak relativistic Gaussian laser pulse propagating in a magnetized plasma is investigated. The nonlinear Schrödinger equation, which describes the laser pulse amplitude evolution, is deduced and solved numerically. The pulse compression is observed in the cases of both left- and right-hand circular polarized lasers. It is found that the compressed velocity is increased for the left-hand circular polarized laser fields, while decreased for the right-hand ones, which is reinforced as the enhancement of the external magnetic field. We find a 100 fs left-hand circular polarized laser pulse is compressed in a magnetized (1757 T) plasma medium by more than ten times. The results in this paper indicate the possibility of generating particularly intense and short pulses.

Authors:
; ; ; ;  [1]
  1. Key Laboratory of Beam Technology and Materials Modification of the Ministry of Education, and College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China and Beijing Radiation Center, Beijing 100875 (China)
Publication Date:
OSTI Identifier:
22490981
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 7; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AMPLITUDES; COMPRESSION; LASER RADIATION; MAGNETIC FIELDS; NONLINEAR PROBLEMS; PLASMA; PULSES; RELATIVISTIC RANGE; SCHROEDINGER EQUATION

Citation Formats

Liang, Yun, Sang, Hai-Bo, E-mail: sanghb@bnu.edu.cn, Wan, Feng, Lv, Chong, and Xie, Bai-Song. Relativistic laser pulse compression in magnetized plasmas. United States: N. p., 2015. Web. doi:10.1063/1.4926590.
Liang, Yun, Sang, Hai-Bo, E-mail: sanghb@bnu.edu.cn, Wan, Feng, Lv, Chong, & Xie, Bai-Song. Relativistic laser pulse compression in magnetized plasmas. United States. doi:10.1063/1.4926590.
Liang, Yun, Sang, Hai-Bo, E-mail: sanghb@bnu.edu.cn, Wan, Feng, Lv, Chong, and Xie, Bai-Song. 2015. "Relativistic laser pulse compression in magnetized plasmas". United States. doi:10.1063/1.4926590.
@article{osti_22490981,
title = {Relativistic laser pulse compression in magnetized plasmas},
author = {Liang, Yun and Sang, Hai-Bo, E-mail: sanghb@bnu.edu.cn and Wan, Feng and Lv, Chong and Xie, Bai-Song},
abstractNote = {The self-compression of a weak relativistic Gaussian laser pulse propagating in a magnetized plasma is investigated. The nonlinear Schrödinger equation, which describes the laser pulse amplitude evolution, is deduced and solved numerically. The pulse compression is observed in the cases of both left- and right-hand circular polarized lasers. It is found that the compressed velocity is increased for the left-hand circular polarized laser fields, while decreased for the right-hand ones, which is reinforced as the enhancement of the external magnetic field. We find a 100 fs left-hand circular polarized laser pulse is compressed in a magnetized (1757 T) plasma medium by more than ten times. The results in this paper indicate the possibility of generating particularly intense and short pulses.},
doi = {10.1063/1.4926590},
journal = {Physics of Plasmas},
number = 7,
volume = 22,
place = {United States},
year = 2015,
month = 7
}
  • Cited by 1
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  • The compression of a relativistic Gaussian laser pulse in a magnetized plasma is investigated. By considering relativistic nonlinearity and using non-linear Schrödinger equation with paraxial approximation, a second-order differential equation is obtained for the pulse width parameter (in time) to demonstrate the longitudinal pulse compression. The compression of laser pulse in a magnetized plasma can be observed by the numerical solution of the equation for the pulse width parameter. The effects of magnetic field and chirping are investigated. It is shown that in the presence of magnetic field and negative initial chirp, compression of pulse is significantly enhanced.
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  • In this work, the spatiotemporal evolution of Gaussian laser pulse propagated through a plasma is investigated in the presence of an external axial magnetic field. The coupled equations of self-focusing and self-compression are obtained via paraxial approximation by taking into account the relativistic nonlinearity. The effect of axial magnetic field on simultaneously relativistic self-focusing and self-compression of the laser pulse is studied for homogeneous and inhomogeneous plasmas. The results show that the simultaneous use of both axial magnetic field and density ramp-up leads to generate pulses with the smallest spot size and shortest compression length.