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Towards laser ion acceleration with holed targets

Published online by Cambridge University Press:  26 May 2020

Prokopis Hadjisolomou Open the ORCID record for Prokopis Hadjisolomou [Opens in a new window] ,
S. V. Bulanov Open the ORCID record for S. V. Bulanov [Opens in a new window]  and
G. Korn
Prokopis Hadjisolomou*
Affiliation:
Institute of Physics of the ASCR, ELI-Beamlines project, Na Slovance 2, 18221Prague, Czech Republic
S. V. Bulanov
Affiliation:
Institute of Physics of the ASCR, ELI-Beamlines project, Na Slovance 2, 18221Prague, Czech Republic National Institutes for Quantum and Radiological Science and Technology (QST), Kansai Photon Science Institute, 8-1-7 Umemidai, Kizugawa, Kyoto619-0215, Japan
G. Korn
Affiliation:
Institute of Physics of the ASCR, ELI-Beamlines project, Na Slovance 2, 18221Prague, Czech Republic
*
† Email address for correspondence: [email protected]
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Abstract

Although the interaction of a flat foil with currently available laser intensities is now considered a routine process, during the last decade, emphasis has been given to targets with complex geometries aiming at increasing the ion energy. This work presents a target geometry where two symmetric side holes and a central hole are drilled into the foil. A study of the various side-hole and central-hole length combinations is performed with two-dimensional particle-in-cell simulations for polyethylene targets and a laser intensity of $5.2\times 10^{21}~\text{W}~\text{cm}^{-2}$. The holed targets show a remarkable increase of the conversion efficiency, which corresponds to a different target configuration for electrons, protons and carbon ions. Furthermore, diffraction of the laser pulse leads to a directional high energy electron beam, with a temperature of ${\sim}40~\text{MeV}$, or seven times higher than in the case of a flat foil. The higher conversion efficiency consequently leads to a significant enhancement of the maximum proton energy from holed targets.

Keywords

intense particle beamsplasma simulation
Type
Research Article
Information
Journal of Plasma Physics , Volume 86 , Issue 3 , June 2020 , 905860304
Copyright
© The Author(s), 2020. Published by Cambridge University Press

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