Main > High Power Laser Science and Engineering >  Volume 8 >  Issue 2 >  Page 02000e24 > Article
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• Received: Feb. 21, 2020

Accepted: May. 20, 2020

Posted: Jun. 23, 2020

Published Online: Jun. 23, 2020

The Author Email: J. Hornung (j.hornung@gsi.de)

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J. Hornung, Y. Zobus, P. Boller, C. Brabetz, U. Eisenbarth, T. Kühl, Zs. Major, J. B. Ohland, M. Zepf, B. Zielbauer, V. Bagnoud. Enhancement of the laser-driven proton source at PHELIX[J]. High Power Laser Science and Engineering, 2020, 8(2): 02000e24

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## Abstract

We present a study of laser-driven ion acceleration with micrometre and sub-micrometre thick targets, which focuses on the enhancement of the maximum proton energy and the total number of accelerated particles at the PHELIX facility. Using laser pulses with a nanosecond temporal contrast of up to $10^{-12}$ and an intensity of the order of $10^{20}~\text{W}/\text{cm}^{2}$, proton energies up to 93 MeV are achieved. Additionally, the conversion efficiency at $45^{\circ }$ incidence angle was increased when changing the laser polarization to p, enabling similar proton energies and particle numbers as in the case of normal incidence and s-polarization, but reducing the debris on the last focusing optic.

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