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Influence of laser irradiated spot size on energetic electron injection and proton acceleration in foil targets

Författare:
  • M. Coury
  • D. C. Carroll
  • A. P. L. Robinson
  • X. H. Yuan
  • C. M. Brenner
  • Matthias Burza
  • R. J. Gray
  • M. N. Quinn
  • K. L. Lancaster
  • Y. T. Li
  • X. X. Lin
  • O. Tresca
  • Claes-Göran Wahlström
  • D. Neely
  • P. McKenna
Publiceringsår: 2012
Språk: Engelska
Publikation/Tidskrift/Serie: Applied Physics Letters
Volym: 100
Nummer: 7
Dokumenttyp: Artikel i tidskrift
Förlag: American Institute of Physics

Sammanfattning

The influence of irradiated spot size on laser energy coupling to electrons, and subsequently to protons, in the interaction of intense laser pulses with foil targets is investigated experimentally. Proton acceleration is characterized for laser intensities ranging from 2 x 10(18) - 6 x 10(20) W/cm(2), by (1) variation of the laser energy for a fixed irradiated spot size, and (2) by variation of the spot size for a fixed energy. At a given laser pulse intensity, the maximum proton energy is higher under defocus illumination compared to tight focus and the results are explained in terms of geometrical changes to the hot electron injection. (C) 2012 American Institute of Physics. [doi:10.1063/1.3685615]

Nyckelord

  • Atom and Molecular Physics and Optics

Övriga

Published
  • ISSN: 0003-6951

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