X-ray radiation transport in GPU accelerated Particle In Cell simulations

Ultra-high-intensity laser pulse interactions with solid density targets are of central importance for
modern accelerator physics, Inertial Confinement Fusion(ICF) and astrophysics. In order to meet
the requirements of real-world applications, a deeper understanding of the underlying plasma
dynamics, including plasma instabilities and acceleration mechanisms, is needed. X-ray radiation
plays a substantial role in plasma physics, either as an integral part of a physical system itself or
as a useful diagnostic, hence it should be included in computational models.
Therefore, we bring a Monte Carlo based X-ray radiation transport module into our Particle In
Cell simulation framework PIConGPU. It allows, among others, for Thompson scattering, e.g. for
small-angle X-ray scattering (SAXS), and Faraday effect calculation for X-ray polarimetry - as
online, in-situ diagnostics.