Abstract
A parametric study is reported where a femtosecond prepulse is used to change the target properties before the interaction with a multi-terawatt laser pulse which accelerates protons from a foil target. The proton spectrum as function of the prepulse delay and intensity, up to 1.5 ns and up to 3×1016 W/cm2, respectively, shows a global decrease of the maximum proton energy with delay and intensity. However, under appropriate conditions, it is found that the maximum proton energy increases by more than 10% and that the spectral shape changes.
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Glinec, Y., Genoud, G., Lundh, O. et al. Evolution of energy spectrum from laser-accelerated protons with a 100 fs intense prepulse. Appl. Phys. B 93, 317–321 (2008). https://doi.org/10.1007/s00340-008-3172-6
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DOI: https://doi.org/10.1007/s00340-008-3172-6