Direct evidence of strongly inhomogeneous energy deposition in target heating with laser-produced ion beams

  • E. Brambrink
  • , T. Schlegel
  • , G. Malka
  • , K. U. Amthor
  • , M. M. Aléonard
  • , G. Claverie
  • , M. Gerbaux
  • , F. Gobet
  • , F. Hannachi
  • , V. Méot
  • , P. Morel
  • , P. Nicolai
  • , J. N. Scheurer
  • , M. Tarisien
  • , V. Tikhonchuk
  • , P. Audebert

Research output: Contribution to journalArticlepeer-review

Abstract

We report on strong nonuniformities in target heating with intense, laser-produced proton beams. The observed inhomogeneity in energy deposition can strongly perturb equation of state (EOS) measurements with laser-accelerated ions which are planned in several laboratories. Interferometric measurements of the target expansion show different expansion velocities on the front and rear surfaces, indicating a strong difference in local temperature. The nonuniformity indicates at an additional heating mechanism, which seems to originate from electrons in the keV range.

Original languageEnglish
Article number065401
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume75
Issue number6
DOIs
Publication statusPublished - 6 Jun 2007

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