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Proton probe measurement of fast advection of magnetic fields by hot electrons

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • L. Willingale
  • A. G. R. Thomas
  • P. M. Nilson
  • M. C. Kaluza
  • S. Bandyopadhyay
  • A. E. Dangor
  • R. G. Evans
  • P. Fernandes
  • M. G. Haines
  • C. Kamperidis
  • R. J. Kingham
  • S. Minardi
  • M. Notley
  • C. P. Ridgers
  • W. Rozmus
  • M. Sherlock
  • M. Tatarakis
  • M. S. Wei
  • Z. Najmudin
  • K. Krushelnick
Article number124026
<mark>Journal publication date</mark>12/2011
<mark>Journal</mark>Plasma Physics and Controlled Fusion
Issue number12
Number of pages9
Publication StatusPublished
<mark>Original language</mark>English


A laser generated proton beam was used to measure the megagauss strength self-generated magnetic fields from a nanosecond laser interaction with an aluminum target. At intensities of 10(15) W cm(-2), the significant hot electron production and strong heat fluxes result in non-local transport becoming important to describe the magnetic field dynamics. Two-dimensional implicit Vlasov-Fokker-Planck modeling shows that fast advection of the magnetic field from the focal region occurs via the Nernst effect at significantly higher velocities than the sound speed, (v)N/c(s) approximate to 10.