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

Coury, M.; Carroll, D. C.; Robinson, A. P. L.; Yuan, X. H.; Brenner, C. M.; Burza, Matthias LU ; Gray, R. J.; Quinn, M. N.; Lancaster, K. L. and Li, Y. T., et al. (2012) In Applied Physics Letters 100(7).
Abstract
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]
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publication status
published
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Applied Physics Letters
volume
100
issue
7
publisher
American Institute of Physics
external identifiers
  • wos:000300436800092
  • scopus:84863181609
ISSN
0003-6951
DOI
10.1063/1.3685615
language
English
LU publication?
yes
id
59422342-28de-4e55-84a5-9b434d78dc35 (old id 2517346)
date added to LUP
2012-05-09 09:54:20
date last changed
2017-01-01 03:41:59
@article{59422342-28de-4e55-84a5-9b434d78dc35,
  abstract     = {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]},
  articleno    = {074105},
  author       = {Coury, M. and Carroll, D. C. and Robinson, A. P. L. and Yuan, X. H. and Brenner, C. M. and Burza, Matthias and Gray, R. J. and Quinn, M. N. and Lancaster, K. L. and Li, Y. T. and Lin, X. X. and Tresca, O. and Wahlström, Claes-Göran and Neely, D. and McKenna, P.},
  issn         = {0003-6951},
  language     = {eng},
  number       = {7},
  publisher    = {American Institute of Physics},
  series       = {Applied Physics Letters},
  title        = {Influence of laser irradiated spot size on energetic electron injection and proton acceleration in foil targets},
  url          = {http://dx.doi.org/10.1063/1.3685615},
  volume       = {100},
  year         = {2012},
}