Mainz 2022 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 1: New Accelerator Concepts 1
AKBP 1.2: Vortrag
Montag, 28. März 2022, 14:15–14:30, AKBP-H13
Synthetic shadowgrams of laser-plasma accelerators computed by a PIConGPU in-situ plugin — •Finn-Ole Carstens1,2, Klaus Steiniger1, Richard Pausch1, Yen-Yu Chang1, Susanne Schöbel1, Jurjen Couperus1, Arie Irman1, Max Lehmann1,2, Rene Widera1, Michael Bussmann1,3, Ulrich Schramm1,2, Thomas Cowan1,2, and Alexander Debus1 — 1Helmholtz-Zentrum Dresden-Rossendorf — 2Technische Universität Dresden — 3Center for Advanced Systems Understanding Görlitz
Few-cycle shadowgraphy is a valuable diagnostic for laser-plasma accelerators to obtain insight into the µm- and fs-scale relativistic plasma dynamics. To enhance the understanding of experimental shadowgrams we developed a synthetic shadowgram diagnostic within the fully relativistic particle-in-cell code PIConGPU.
In an initial version of the synthetic shadowgraphy diagnostic, the probe laser is propagated through the plasma using PIConGPU, and then extracted and propagated onto a virtual CCD using a post-processing code based on Fourier optics. However, the latter step requires 3D-FFTs, which results in performance and scaling limitations in large-scale simulations. To circumvent this, we develop an in-situ plugin for PIConGPU, in which we extract the probe laser slice-wise to obtain the synthetic shadowgrams during the simulation without post-processing.
In this talk, we present the development of the PIConGPU plugin and show preliminary results of synthetic shadowgrams for laser and plasma wakefield accelerators.