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  • PhysRevLett.96.245002

    Rights statement: © 2006 American Physical Society

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Collimated multi-MeV ion beams from high-intensity laser interactions with underdense plasma

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  • L Willingale
  • SPD Mangles
  • PM Nilson
  • RJ Clarke
  • AE Dangor
  • MC Kaluza
  • S Karsch
  • KL Lancaster
  • WB Mori
  • Z Najmudin
  • J Schreiber
  • Alec Thomas
  • MS Wei
  • K Krushelnick
Article number245002
<mark>Journal publication date</mark>23/06/2006
<mark>Journal</mark>Physical review letters
Issue number24
Number of pages4
Publication StatusPublished
<mark>Original language</mark>English


A beam of multi-MeV helium ions has been observed from the interaction of a short-pulse high-intensity laser pulse with underdense helium plasma. The ion beam was found to have a maximum energy for He2+ of (40(-8)(+3)) MeV and was directional along the laser propagation path, with the highest energy ions being collimated to a cone of less than 10 degrees. 2D particle-in-cell simulations show that the ions are accelerated by a sheath electric field that is produced at the back of the gas target. This electric field is generated by transfer of laser energy to a hot electron beam, which exits the target generating large space-charge fields normal to its boundary.

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© 2006 American Physical Society