Mainz 2022 – scientific programme
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P: Fachverband Plasmaphysik
P 4: Low Pressure Plasmas II / Laser Plasmas II
P 4.3: Talk
Monday, March 28, 2022, 16:30–16:45, P-H11
Start to End simulations with 20 J Laser in relativistically induced transparency regime — •Ilja Göthel1,2, Tim Ziegler1,2, Marco Garten1,2, Constantin Bernert1, Karl Zeil1, Marvin E.P. Umlandt1,2, Thomas Miethlinger1,2, Sergei Bastrakov1, Ulrich Schramm1, and Thomas Kluge1 — 1Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden — 2Technische Universität Dresden, 01069 Dresden
TNSA has proven the experimentally most robust mechanism for accelerating ions with ultraintense laser pulses. In experiments at the Draco-PW laser we achieved the promising RIT regime, known for enhancing the performance beyond normal TNSA (several shots of 100MeV protons). Also, advanced pulse and beam characterization techniques enable us to deepen our understanding by simulations.
We present here a start-to-end simulation campaign with a hybrid code approach - hydrodynamic preexpansion in the time 100ps-1ps before the peak, and a 3d PIC mainpulse interaction with input from the hydro code. The scan reproduces the experimentally found behaviour of reflected and transmitted beam diagnostics with thickness.
The enhancement in the RIT regime is known from literature. For a predictive simulation, however, the hybrid code approach is necessary due to the decisive effect of preexpansion by the intrinsic contrast of the laser. Reaching these high energies reproducibly without pulse contrast cleaning devices opens the way to high repetition rate usage; deeper understanding the dynamics by predictive simulations may prove crucial for further progress.