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Effects of laser prepulses on laser-induced proton generation

Batani, D.; Jafer, R.; Veltcheva, M.; Dezulian, R.; Lundh, O.; Lindau, Filip LU ; Persson, Anders LU ; Osvay, K.; Wahlstrom, C-G and Carroll, D. C., et al. (2010) In New Journal of Physics 12.
Abstract
Low-intensity laser prepulses (<10(13) W cm(-2), nanosecond duration) are a major issue in experiments on laser-induced generation of protons, often limiting the performances of proton sources produced by high-intensity lasers (approximate to 10(19) W cm(-2), picosecond or femtosecond duration). Depending on the intensity regime, several effects may be associated with the prepulse, some of which are discussed in this paper: (i) destruction of thin foil targets by the shock generated by the laser prepulse; (ii) creation of preplasma on the target front side affecting laser absorption; (iii) deformation of the target rear side; and (iv) whole displacement of thin foil targets affecting the focusing condition. In particular, we show that... (More)
Low-intensity laser prepulses (<10(13) W cm(-2), nanosecond duration) are a major issue in experiments on laser-induced generation of protons, often limiting the performances of proton sources produced by high-intensity lasers (approximate to 10(19) W cm(-2), picosecond or femtosecond duration). Depending on the intensity regime, several effects may be associated with the prepulse, some of which are discussed in this paper: (i) destruction of thin foil targets by the shock generated by the laser prepulse; (ii) creation of preplasma on the target front side affecting laser absorption; (iii) deformation of the target rear side; and (iv) whole displacement of thin foil targets affecting the focusing condition. In particular, we show that under oblique high-intensity irradiation and for low prepulse intensities, the proton beam is directed away from the target normal. Deviation is towards the laser forward direction, with an angle that increases with the level and duration of the ASE pedestal. Also, for a given laser pulse, the beam deviation increases with proton energy. The observations are discussed in terms of target normal sheath acceleration, in combination with a laser-controllable shock wave locally deforming the target surface. (Less)
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publication status
published
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New Journal of Physics
volume
12
publisher
IOP Publishing Ltd.
external identifiers
  • wos:000277355400016
  • scopus:77952338117
ISSN
1367-2630
DOI
10.1088/1367-2630/12/4/045018
language
English
LU publication?
yes
id
10a91726-eeb2-4aa6-afa4-5d7dc6ec7ceb (old id 1618325)
date added to LUP
2010-06-22 10:42:47
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2018-06-10 04:20:13
@article{10a91726-eeb2-4aa6-afa4-5d7dc6ec7ceb,
  abstract     = {Low-intensity laser prepulses (&lt;10(13) W cm(-2), nanosecond duration) are a major issue in experiments on laser-induced generation of protons, often limiting the performances of proton sources produced by high-intensity lasers (approximate to 10(19) W cm(-2), picosecond or femtosecond duration). Depending on the intensity regime, several effects may be associated with the prepulse, some of which are discussed in this paper: (i) destruction of thin foil targets by the shock generated by the laser prepulse; (ii) creation of preplasma on the target front side affecting laser absorption; (iii) deformation of the target rear side; and (iv) whole displacement of thin foil targets affecting the focusing condition. In particular, we show that under oblique high-intensity irradiation and for low prepulse intensities, the proton beam is directed away from the target normal. Deviation is towards the laser forward direction, with an angle that increases with the level and duration of the ASE pedestal. Also, for a given laser pulse, the beam deviation increases with proton energy. The observations are discussed in terms of target normal sheath acceleration, in combination with a laser-controllable shock wave locally deforming the target surface.},
  author       = {Batani, D. and Jafer, R. and Veltcheva, M. and Dezulian, R. and Lundh, O. and Lindau, Filip and Persson, Anders and Osvay, K. and Wahlstrom, C-G and Carroll, D. C. and McKenna, P. and Flacco, A. and Malka, V.},
  issn         = {1367-2630},
  language     = {eng},
  publisher    = {IOP Publishing Ltd.},
  series       = {New Journal of Physics},
  title        = {Effects of laser prepulses on laser-induced proton generation},
  url          = {http://dx.doi.org/10.1088/1367-2630/12/4/045018},
  volume       = {12},
  year         = {2010},
}