Multi-pulse enhanced laser ion acceleration using plasma half cavity targets

G. G. Scott, J. S. Green, V. Bagnoud, C. Brabetz, C. M. Brenner, D. C. Carroll, D. A. MacLellan, A. P. L. Robinson, M. Roth, C. Spindloe, F. Wagner, B. Zielbauer, P. McKenna, D. Neely

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Abstract

We report on a plasma half cavity target design for laser driven ion acceleration that enhances the laser to proton energy conversion efficiency and has been found to modify the low energy region of the proton spectrum. The target design utilizes the high fraction of laser energy reflected from an ionized surface and refocuses it such that a double pulse interaction is attained. We report on numerical simulations and experimental results demonstrating that conversion efficiencies can be doubled, compared to planar foil interactions, when the secondary pulse is delivered within picoseconds of the primary pulse.

Original languageEnglish
Article number024101
Number of pages4
JournalApplied Physics Letters
Volume101
Issue number2
Early online date10 Jul 2012
DOIs
Publication statusPublished - 2012

Keywords

  • multi-pulse enhanced
  • half cavity targets
  • plasma
  • laser ion acceleration
  • ionisation
  • plasma simulation
  • plasma light propagation
  • numerical analysis

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