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Proceedings Paper

Ultra-intense laser interaction with specially-designed targets as a source of energetic protons
Author(s): J. Psikal; M. Matys
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Paper Abstract

In this contribution, we discuss the optimization of laser driven proton acceleration efficiency by nanostructured targets, interpret the experimental results showing the manipulation of proton beam profiles by nanosctructured rear surface of the targets and investigate the acceleration of protons from hydrogen solid ribbon by PW-class lasers, with the help of multidimensional particle-in-cell simulations. Microstructured hollow targets are proposed to enhance the absorption of the laser pulse energy while keeping the target thickness to minimum, which is both favorable for enhanced efficiency of the acceleration of protons. Thin targets with grating structures of various configurations on their rear sides stretch the proton beams in the perpendicular direction to the grating orientation due to transverse electric fields generated inside the target grooves and can reduce the proton beam divergence in the parallel direction to the grating due to a lower density of the stretched beam compared with flat foils. Finally, it is shown that when multiPW laser pulse interacts with hydrogen solid ribbon, hole boring radiation pressure acceleration (RPA) dominates over the target normal sheath acceleration (TNSA).

Paper Details

Date Published: 17 May 2017
PDF: 7 pages
Proc. SPIE 10241, Research Using Extreme Light: Entering New Frontiers with Petawatt-Class Lasers III, 102411K (17 May 2017); doi: 10.1117/12.2271026
Show Author Affiliations
J. Psikal, Czech Technical Univ. in Prague (Czech Republic)
ELI Beamlines, Institute of Physics of the ASCR, v.v.i. (Czech Republic)
M. Matys, Czech Technical Univ. in Prague (Czech Republic)

Published in SPIE Proceedings Vol. 10241:
Research Using Extreme Light: Entering New Frontiers with Petawatt-Class Lasers III
Georg Korn; Luis O. Silva, Editor(s)

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