Effects of laser prepulses on laser-induced proton generation

D. Batani, R. Jafer, M. Veltcheva, R. Dezulian, O. Lundh, F. Lindau, A. Persson, K. Osvay, C-G Wahlström, D. C. Carroll, P. McKenna, A. Flacco, V. Malka

Research output: Contribution to journalArticle

22 Citations (Scopus)

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 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.

LanguageEnglish
Article number045018
Number of pages15
JournalNew Journal of Physics
Volume12
DOIs
Publication statusPublished - 30 Apr 2010

Fingerprint

protons
lasers
foils
deviation
aeroservoelasticity
proton energy
proton beams
sheaths
high power lasers
destruction
shock waves
shock
irradiation
pulses

Keywords

  • targets
  • laser prepulses
  • laser-induced proton generation
  • thin foil targets
  • preplasma

Cite this

Batani, D., Jafer, R., Veltcheva, M., Dezulian, R., Lundh, O., Lindau, F., ... Malka, V. (2010). Effects of laser prepulses on laser-induced proton generation. New Journal of Physics, 12, [045018]. https://doi.org/10.1088/1367-2630/12/4/045018
Batani, D. ; Jafer, R. ; Veltcheva, M. ; Dezulian, R. ; Lundh, O. ; Lindau, F. ; Persson, A. ; Osvay, K. ; Wahlström, C-G ; Carroll, D. C. ; McKenna, P. ; Flacco, A. ; Malka, V. / Effects of laser prepulses on laser-induced proton generation. In: New Journal of Physics. 2010 ; Vol. 12.
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Batani, D, Jafer, R, Veltcheva, M, Dezulian, R, Lundh, O, Lindau, F, Persson, A, Osvay, K, Wahlström, C-G, Carroll, DC, McKenna, P, Flacco, A & Malka, V 2010, 'Effects of laser prepulses on laser-induced proton generation' New Journal of Physics, vol. 12, 045018. https://doi.org/10.1088/1367-2630/12/4/045018

Effects of laser prepulses on laser-induced proton generation. / Batani, D.; Jafer, R.; Veltcheva, M.; Dezulian, R.; Lundh, O.; Lindau, F.; Persson, A.; Osvay, K.; Wahlström, C-G; Carroll, D. C.; McKenna, P.; Flacco, A.; Malka, V.

In: New Journal of Physics, Vol. 12, 045018, 30.04.2010.

Research output: Contribution to journalArticle

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T1 - Effects of laser prepulses on laser-induced proton generation

AU - Batani, D.

AU - Jafer, R.

AU - Veltcheva, M.

AU - Dezulian, R.

AU - Lundh, O.

AU - Lindau, F.

AU - Persson, A.

AU - Osvay, K.

AU - Wahlström, C-G

AU - Carroll, D. C.

AU - McKenna, P.

AU - Flacco, A.

AU - Malka, V.

PY - 2010/4/30

Y1 - 2010/4/30

N2 - 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.

AB - 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.

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JO - New Journal of Physics

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JF - New Journal of Physics

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Batani D, Jafer R, Veltcheva M, Dezulian R, Lundh O, Lindau F et al. Effects of laser prepulses on laser-induced proton generation. New Journal of Physics. 2010 Apr 30;12. 045018. https://doi.org/10.1088/1367-2630/12/4/045018