Influence of shock waves on laser-driven proton acceleration

O. Lundh, F. Lindau, A. Persson, C.-G. Wahlstroem, P. McKenna, D. Batani

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

The influence of shock waves, driven by amplified spontaneous emission (ASE), on laser-accelerated proton beams is investigated. A local deformation, produced by a cold shock wave launched by the ablation pressure of the ASE pedestal, can under oblique laser irradiation significantly direct the proton beam toward the laser axis. This can be understood in the frame of target normal sheath acceleration as proton emission from an area of the target where the local target normal is shifted toward the laser axis. Hydrodynamic simulations and experimental data show that there exists a window in laser and target parameter space where the target can be significantly deformed and yet facilitate efficient proton acceleration. The dependence of the magnitude of the deflection on target material, foil thickness, and ASE pedestal intensity and duration is experimentally investigated. The deflection angle is found to increase with increasing ASE intensity and duration and decrease with increasing target thickness. In a comparison between aluminum and copper target foils, aluminum is found to yield a larger proton beam deflection. An analytic model is successfully used to predict the proton emission direction.

LanguageEnglish
Pages026404
Number of pages8
JournalPhysical Review E
Volume76
Issue number2
DOIs
Publication statusPublished - Aug 2007

Fingerprint

Shock Waves
shock waves
Laser
Target
protons
spontaneous emission
lasers
proton beams
deflection
Deflection
Aluminum
foils (materials)
aluminum
target thickness
Influence
Ablation
sheaths
ablation
Oblique
foils

Keywords

  • inertial confinement fusion
  • solid interactions
  • scale length
  • electrons
  • plasmas
  • multi
  • CU

Cite this

Lundh, O., Lindau, F., Persson, A., Wahlstroem, C-G., McKenna, P., & Batani, D. (2007). Influence of shock waves on laser-driven proton acceleration. Physical Review E, 76(2), 026404. https://doi.org/10.1103/PhysRevE.76.026404
Lundh, O. ; Lindau, F. ; Persson, A. ; Wahlstroem, C.-G. ; McKenna, P. ; Batani, D. / Influence of shock waves on laser-driven proton acceleration. In: Physical Review E. 2007 ; Vol. 76, No. 2. pp. 026404.
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Lundh, O, Lindau, F, Persson, A, Wahlstroem, C-G, McKenna, P & Batani, D 2007, 'Influence of shock waves on laser-driven proton acceleration' Physical Review E, vol. 76, no. 2, pp. 026404. https://doi.org/10.1103/PhysRevE.76.026404

Influence of shock waves on laser-driven proton acceleration. / Lundh, O.; Lindau, F.; Persson, A.; Wahlstroem, C.-G.; McKenna, P.; Batani, D.

In: Physical Review E, Vol. 76, No. 2, 08.2007, p. 026404.

Research output: Contribution to journalArticle

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T1 - Influence of shock waves on laser-driven proton acceleration

AU - Lundh, O.

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AU - Persson, A.

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AU - Batani, D.

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AB - The influence of shock waves, driven by amplified spontaneous emission (ASE), on laser-accelerated proton beams is investigated. A local deformation, produced by a cold shock wave launched by the ablation pressure of the ASE pedestal, can under oblique laser irradiation significantly direct the proton beam toward the laser axis. This can be understood in the frame of target normal sheath acceleration as proton emission from an area of the target where the local target normal is shifted toward the laser axis. Hydrodynamic simulations and experimental data show that there exists a window in laser and target parameter space where the target can be significantly deformed and yet facilitate efficient proton acceleration. The dependence of the magnitude of the deflection on target material, foil thickness, and ASE pedestal intensity and duration is experimentally investigated. The deflection angle is found to increase with increasing ASE intensity and duration and decrease with increasing target thickness. In a comparison between aluminum and copper target foils, aluminum is found to yield a larger proton beam deflection. An analytic model is successfully used to predict the proton emission direction.

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