Influence of strong magnetic fields on laser pulse propagation in underdense plasma

T C Wilson, F Y Li, M Weikum, Z M Sheng

Research output: Contribution to journalArticle

8 Citations (Scopus)
29 Downloads (Pure)

Abstract

We examine the interaction between intense laser pulses and strongly magnetised plasmas in the weakly relativistic regime. An expression for the electron Lorentz factor coupling both relativistic and cyclotron motion nonlinearities is derived for static magnetic fields along the laser propagation axis. This is applied to predict modifications to the refractive index, critical density, group velocity dispersion and power threshold for relativistic self-focusing. It is found that electron quiver response is enhanced under right circularly-polarised light, decreasing the power threshold for various instabilities, while a dampening effect occurs under left circularly-polarised light, increasing the power thresholds. Derived theoretical predictions are tested by one and three-dimensional particle-in-cell simulations.
Original languageEnglish
Article number065002
Number of pages9
JournalPlasma Physics and Controlled Fusion
Volume59
Issue number6
Early online date27 Mar 2017
DOIs
Publication statusPublished - 20 Apr 2017

Fingerprint

Light polarization
Laser pulses
Magnetic fields
Group velocity dispersion
Plasmas
polarized light
thresholds
propagation
Electrons
Cyclotrons
Beam plasma interactions
pulses
magnetic fields
lasers
Refractive index
self focusing
group velocity
cyclotrons
Lasers
electrons

Keywords

  • plasma
  • weakly relativistic
  • magnetised
  • underdense

Cite this

@article{f34ebf72265440c3bd5d4083ef20e6ae,
title = "Influence of strong magnetic fields on laser pulse propagation in underdense plasma",
abstract = "We examine the interaction between intense laser pulses and strongly magnetised plasmas in the weakly relativistic regime. An expression for the electron Lorentz factor coupling both relativistic and cyclotron motion nonlinearities is derived for static magnetic fields along the laser propagation axis. This is applied to predict modifications to the refractive index, critical density, group velocity dispersion and power threshold for relativistic self-focusing. It is found that electron quiver response is enhanced under right circularly-polarised light, decreasing the power threshold for various instabilities, while a dampening effect occurs under left circularly-polarised light, increasing the power thresholds. Derived theoretical predictions are tested by one and three-dimensional particle-in-cell simulations.",
keywords = "plasma, weakly relativistic, magnetised, underdense",
author = "Wilson, {T C} and Li, {F Y} and M Weikum and Sheng, {Z M}",
note = "This is an author-created, un-copyedited version of an article accepted for publication in Plasma Physics and Controlled Fusion. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at 10.1088/1361-6587/aa6941",
year = "2017",
month = "4",
day = "20",
doi = "10.1088/1361-6587/aa6941",
language = "English",
volume = "59",
journal = "Plasma Physics and Controlled Fusion",
issn = "0741-3335",
number = "6",

}

Influence of strong magnetic fields on laser pulse propagation in underdense plasma. / Wilson, T C; Li, F Y; Weikum, M; Sheng, Z M.

In: Plasma Physics and Controlled Fusion, Vol. 59, No. 6, 065002, 20.04.2017.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Influence of strong magnetic fields on laser pulse propagation in underdense plasma

AU - Wilson, T C

AU - Li, F Y

AU - Weikum, M

AU - Sheng, Z M

N1 - This is an author-created, un-copyedited version of an article accepted for publication in Plasma Physics and Controlled Fusion. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at 10.1088/1361-6587/aa6941

PY - 2017/4/20

Y1 - 2017/4/20

N2 - We examine the interaction between intense laser pulses and strongly magnetised plasmas in the weakly relativistic regime. An expression for the electron Lorentz factor coupling both relativistic and cyclotron motion nonlinearities is derived for static magnetic fields along the laser propagation axis. This is applied to predict modifications to the refractive index, critical density, group velocity dispersion and power threshold for relativistic self-focusing. It is found that electron quiver response is enhanced under right circularly-polarised light, decreasing the power threshold for various instabilities, while a dampening effect occurs under left circularly-polarised light, increasing the power thresholds. Derived theoretical predictions are tested by one and three-dimensional particle-in-cell simulations.

AB - We examine the interaction between intense laser pulses and strongly magnetised plasmas in the weakly relativistic regime. An expression for the electron Lorentz factor coupling both relativistic and cyclotron motion nonlinearities is derived for static magnetic fields along the laser propagation axis. This is applied to predict modifications to the refractive index, critical density, group velocity dispersion and power threshold for relativistic self-focusing. It is found that electron quiver response is enhanced under right circularly-polarised light, decreasing the power threshold for various instabilities, while a dampening effect occurs under left circularly-polarised light, increasing the power thresholds. Derived theoretical predictions are tested by one and three-dimensional particle-in-cell simulations.

KW - plasma

KW - weakly relativistic

KW - magnetised

KW - underdense

UR - http://iopscience.iop.org/journal/0741-3335

U2 - 10.1088/1361-6587/aa6941

DO - 10.1088/1361-6587/aa6941

M3 - Article

VL - 59

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

SN - 0741-3335

IS - 6

M1 - 065002

ER -