Würzburg 2018 – wissenschaftliches Programm

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 8: Poster session

AKBP 8.11: Poster

Mittwoch, 21. März 2018, 18:00–19:30, NW-Bau - HS2

FBPIC: A spectral, quasi-3D, multi-GPU Particle-In-Cell code for plasma accelerators — •Manuel Kirchen, Sören Jalas, Sebastian Mahncke, and Andreas R. Maier — Center for Free-Electron Laser Science & Department of Physics, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany

Plasma accelerators are compact high-energy particle sources. Excited by an ultra-short laser or particle beam driver, the strong electric fields inside a plasma allow to accelerate electron bunches to GeV energy levels on mm length scales. Modelling the complex acceleration process requires computationally demanding Particle-In-Cell codes that self-consistently solve the electromagnetic particle interaction inside the plasma. Here, we present FBPIC - a highly parallel Particle-In-Cell code featuring a spectral electromagnetic solver that eliminates numerical instabilities common to traditional field solvers, a quasi-3D geometry that greatly reduces the computational costs and the Lorentz-boosted frame technique that scales down the required simulation time by orders of magnitude. The code is written in pure Python using Just-In-Time compilation to generate machine code supporting CPU multi-threading and multi-GPU execution.