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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)

    DOI: 10.1017/hpl.2020.23

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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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High Power Laser Science and Engineering, Vol. 8, Issue 2, 02000e24 (2020)

Enhancement of the laser-driven proton source at PHELIX

J. Hornung1,2,3,†, Y. Zobus1,4, P. Boller1,4, C. Brabetz1, U. Eisenbarth1, T. Kühl1,5, Zs. Major1,3, J. B. Ohland1,4, M. Zepf2,3, B. Zielbauer1, and V. Bagnoud1

Author Affiliations

  • 1GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
  • 2Friedrich-Schiller-Universität, Fürstengraben 1, 07743 Jena, Germany
  • 3Helmholtz-Institut Jena, Fröbelstieg 3, 07743 Jena, Germany
  • 4Technische Universität Darmstadt, Karolinenplatz 5, 64289 Darmstadt, Germany
  • 5Johannes Gutenberg University, Mainz, Saarstraße 21, 55122 Mainz, Germany

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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