Würzburg 2018 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 5: New Accelerator Concepts II
AKBP 5.2: Vortrag
Dienstag, 20. März 2018, 16:45–17:00, NW-Bau - HS2
Investigating the picosecond leading pulse edge influence on ultra-intense laser heating of solids with 3D PIC simulations — •Marco Garten1,2, Axel Huebl1,2, René Widera1, Heiko Burau1,2, Thomas Kluge1, Ulrich Schramm1, and Michael Bussmann1 — 1Helmholtz-Zentrum Dresden - Rossendorf — 2Technische Universität Dresden
Laser-ion acceleration processes depend strongly on the complex plasma dynamics following the generation of relativistic electrons and bulk heating of a solid target by a short-pulse ultra-high intensity laser. A better understanding of the influence of the pre-pulse phase and picosecond leading pulse edge could lead to better control and reproducibility of ion cutoff energies, two crucial requirements for using laser-plasma accelerated ions for medical applications. We present the first results from a 3D PIC simulation campaign, modeling ultra-intense (a0 = 20) laser interaction with up to micrometer thick foils covering the picosecond time span prior to the arrival of the main pulse. In addition to laser absorption efficiency, electron spectrum, divergence and plasma scale lengths we investigate the spatially and energy-resolved spectrum of in-situ calculated Bremsstrahlung and synchrotron radiation originating from keV to MeV electrons. Simulations have been performed at the Piz Daint supercomputer at CSCS, Switzerland, using the fully-relativistic 3D3V open-source particle-in-cell code PIConGPU developed at HZDR.