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Measurements of ultrastrong magnetic fields during relativistic laser-plasma interactions

Research output: Contribution to journalArticle

Published copy (DOI)

Author(s)

  • M Tatarakis
  • A Gopal
  • I Watts
  • F N Beg
  • A E Dangor
  • K Krushelnick
  • U Wagner
  • P A Norreys
  • E L Clark
  • M Zepf
  • R G Evans

Department/unit(s)

Publication details

JournalPhysics of Plasmas
DatePublished - May 2002
Issue number5
Volume9
Number of pages7
Pages (from-to)2244-2250
Original languageEnglish

Abstract

Measurements of magnetic fields generated during ultrahigh intensity (>10(19) W cm(-2)), short pulse (0.7-1 ps) laser-solid target interaction experiments are reported. An innovative method is used and the results are compared with particle-in-cell simulations. It is shown that polarization measurements of the self-generated harmonics of the laser can provide a convenient method for diagnosing the magnetic field-and that the experimental measurements indicate the existence of peak fields greater than 340 MG and below 460 MG at such high intensities. In particular, the observation of the X-wave cutoffs and the observed induced ellipticity of the harmonics can provide a reliable method for measuring these fields. These observations are important for evaluating the use of intense lasers in various potential applications and perhaps for understanding the complex physics of exotic astrophysical objects such as neutron stars. (C) 2002 American Institute of Physics.

    Research areas

  • OVERDENSE PLASMA, SOLID TARGETS, GENERATION, PULSE, MECHANISMS, ABSORPTION, TRANSPORT, FUSION, LIGHT

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