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Measurements of magnetic fields generated in underdense plasmas by intense lasers

  • Z. Najmudin
  • , B. R. Walton
  • , S. P.D. Mangles
  • , A. E. Dangor
  • , S. Fritzler
  • , V. Malka
  • , J. Faure
  • , M. Tatarakis
  • , K. Krushelnick

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Measurements have been made of the magnetic field generated by the passage of high intensity short laser pulses through underdense plasmas. For a 30 fs, 1 J, 800 nm linearly-polarised laser pulse, an azimuthal magnetic field is observed at a radial extent of approximately 200 μm. The field is found to exceed 2.8 MG. For a 1 ps, 40 J, 1054 nm circularly-polarised laser pulse, a solenoidal field is observed that can exceed 7 MG. This solenoidal field is absent with linear polarised light, and hence can be considered as an Inverse Faraday effect. Both types of field are found to decay on the picosecond timescale. For both the azimuthal and solenoidal fields produced by such intense lasers, the production of energetic electrons by the interaction is thought to be vital for magnetic field generation.

Original languageEnglish
Title of host publicationSUPERSTRONG FIELDS IN PLASMAS
Subtitle of host publication3rd International Conference on Superstrong Fields in Plasmas
Pages53-64
Number of pages12
DOIs
Publication statusPublished - 7 Apr 2006
Event3rd International Conference on Superstrong Fields in Plasmas - Varenna, Italy
Duration: 19 Sept 200524 Sept 2005

Publication series

NameAIP Conference Proceedings
Volume827
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference3rd International Conference on Superstrong Fields in Plasmas
Country/TerritoryItaly
CityVarenna
Period19/09/0524/09/05

Keywords

  • High intensity laser
  • Magnetic fields
  • Underdense plasma

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