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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 2: Novel Accelerator Concepts I
AKBP 2.3: Vortrag
Dienstag, 1. April 2025, 14:30–14:45, ZHG004
Optical Imaging as Synthetic Diagnostic in PIConGPU — •Finn-Ole Carstens1,2, Richard Pausch1, Klaus Steiniger1, Fabia Dietrich1,2, Jessica Tiebel1,2, Nico Wrobel1,2, Susanne Schöbel1, Patrick Ufer1,2, Arie Irman1, Michael Bussmann1, Ulrich Schramm1,2, and Alexander Debus1 — 1Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden, Deutschland — 2Technische Universität Dresden, Dresden, Deutschland
We present a synthetic shadowgraphy plugin for the particle-in-cell code PIConGPU. By time-integrating electric and magnetic fields and propagating them onto a screen in the far field with Fourier methods, shadowgram images equivalent to experimental measurements can be produced.
Our in-situ plugin enables recording few-cycle probe pulses after they propagate through plasma structures of e.g. laser-plasma accelerators. Propagation of the probe pulse takes place during the normal PIC cycle, meaning that all laser-plasma interactions are self-consistently taken into account. By analyzing these shadowgrams alongside the 3D, time-resolved density distribution from the simulation, one can trace the origin of specific features, such as cavity elongation and deformation and a variety of scattering signals that allow improving our understanding of the cavity formation and dynamics in experiments.
Keywords: LWFA; PWFA; Shadowgraphy; Fourier; Particle-In-Cell