## Tim Huege for the CORSIKA 8 Collaboration (talk)
### The particle-shower simulation code CORSIKA 8
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CORSIKA 8 is a new framework for air shower simulations implemented in modern C++17, based on past experience with existing codes like CORSIKA 7. The flexible and modular structure of the project allows the development of independent modules that can produce a fully customizable air shower simulation. The radio module in particular is designed to treat the signal propagation and electric field calculation to each antenna in an autonomous and flexible way. It provides the possibility to simulate simultaneously the radio emission calculated with two independent time-domain formalisms, the “Endpoint formalism” as implemented in CoREAS and the “ZHS” algorithm as ported from ZHAireS. Future development for the simulation of radio emission from particle showers in complex scenarios, for example cross-media showers penetrating from air into ice, can build on the existing radio module, re-using the established interfaces.
In this work, we will present the design and implementation of the radio module in CORSIKA 8, and show a direct comparison of radio emission from air showers simulated with CORSIKA 8, CORSIKA 7 and ZHAireS.
## Dominik Baack
## Dominik Baack for the CORSIKA 8 Collaboration (talk)
### Comparison and efficiency of GPU accelerated optical light propagation in CORSIKA8
AI accelerators have proliferated in data centres in recent years and are now almost ubiquitous. In addition, their computational power and, most importantly, their energy efficiency are up to orders of magnitude higher than that of traditional computing. In recent years, various methods and optimisations have been tested to use these hybrid systems for simulations in the context of astroparticle physics.
The main focus of this talk is the propagation of optical, i.e. flourescence and Cherenkov, photons through thin inhomogeneous media. Different techniques used and approximations, e.g. the atmospheric model, tested during the development will be presented. The trade-off between performance and precision allows the experiment to achieve its physical precision limited to the real resolution of the experiment and not invest power and time and vanishing precision gains. The additional comparison of classical CPU-based simulations with the new methods validates these methods and allows evaluation against a known baseline.
## Juan Ammerman
## Juan Ammerman, Uzair Latif, Nikolaos Karastathis, Tim Huege for the CORSIKA 8 Collaboration, Simon de Kockere (poster)
### Simulations of cross media showers with CORSIKA 8
