Influence of the target front-surface curvature on proton acceleration in laser-foil interaction

Bin, J. H.; Lei, A. L.; Cao, L. H.; Yang, X. Q.; Huang, L. G.; Yu, M. Y.; Wei Yu
April 2009
Physics of Plasmas;Apr2009, Vol. 16 Issue 4, p043109
Academic Journal
Energetic proton generation from thin foil targets by ultraintense laser pulse is investigated using two-dimensional particle-in-cell simulation. Foil targets with concave, flat, and convex front surfaces are considered. The maximum energy of the accelerated protons depends on the front-surface curvature, and the highest-energy protons are from the concave foil. The result can be attributed to an enhancement of the generation as well as concentration of the laser-driven hot electrons by the concave surface.


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