Selective deuterium ion acceleration using the Vulcan petawatt laser

  • A. G. Krygier
  • , J. T. Morrison
  • , S. Kar
  • , H. Ahmed
  • , A. Alejo
  • , R. Clarke
  • , J. Fuchs
  • , A. Green
  • , D. Jung
  • , A. Kleinschmidt
  • , Z. Najmudin
  • , H. Nakamura
  • , P. Norreys
  • , M. Notley
  • , M. Oliver
  • , M. Roth
  • , L. Vassura
  • , M. Zepf
  • , M. Borghesi
  • , R. R. Freeman

Research output: Contribution to journalArticlepeer-review

Abstract

We report on the successful demonstration of selective acceleration of deuterium ions by target-normal sheath acceleration (TNSA) with a high-energy petawatt laser. TNSA typically produces a multi-species ion beam that originates from the intrinsic hydrocarbon and water vapor contaminants on the target surface. Using the method first developed by Morrison et al. [Phys. Plasmas 19, 030707 (2012)], an ion beam with >99% deuterium ions and peak energy 14 MeV/nucleon is produced with a 200 J, 700 fs, > 10 20 W/cm 2 laser pulse by cryogenically freezing heavy water (D2O) vapor onto the rear surface of the target prior to the shot. Within the range of our detectors (0°-8.5°), we find laser-to-deuterium-ion energy conversion efficiency of 4.3% above 0.7 MeV/nucleon while a conservative estimate of the total beam gives a conversion efficiency of 9.4%.

Original languageEnglish
Article number053102
JournalPhysics of Plasmas
Volume22
Issue number5
DOIs
Publication statusPublished - 1 May 2015

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