Laser-plasma proton acceleration with a combined gas-foil target

Dan Levy, Constantin Bernert, Martin Rehwald, Igor A. Andriyash, Stefan Assenbaum, Thomas Kluge, Eyal Kroupp, Lieselotte Obst-Huebl, Richard Pausch, Alexander Schulze-Makuch, Karl Zeil, Ulrich Schramm, Victor Malka

Research output: Contribution to journalArticlepeer-review

Abstract

Laser-plasma proton acceleration was investigated in the target normal sheath acceleration regime with a target composed of a gas layer and a thin foil. The laser's shape, duration, energy and frequency are modified as it propagates in the gas, altering the laser-solid interaction leading to proton acceleration. The modified properties of the laser were assessed by both numerical simulations and by measurements. The 3D particle-in-cell simulations have shown that a nearly seven-fold increase in peak intensity at the foil plane is possible. In the experiment, maximum proton energies showed high dependence on the energy transmission of the laser through the gas and a lesser dependence on the size and shape of the pulse. At high gas densities, where high intensity was expected, laser energy depletion and pulse distortion suppressed proton energies. At low densities, with the laser focused far behind the foil, self-focusing was observed and the gas showed a positive effect on proton energies. The promising results of this first exploration motivate further study of the target.

Original languageEnglish
Article number103068
Number of pages9
JournalNew Journal of Physics
Volume22
Issue number10
DOIs
StatePublished - Oct 2020

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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