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

På svenska

Author

  • 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
Show all

Summary, in English

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]

Department/s

Publishing year

2012

Language

English

Publication/Series

Applied Physics Letters

Volume

100

Issue

7

Document type

Journal article

Publisher

American Institute of Physics (AIP)

Topic

  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0003-6951