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# ICRC2023 talks:
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## Tim Huege for the CORSIKA 8 Collaboration (talk, CRI20-08, August 2nd, PoS(ICRC2023)310)
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## Tim Huege for the CORSIKA 8 Collaboration (talk, CRI20-08, Aug2, PoS(ICRC2023)310)
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### The particle-shower simulation code CORSIKA 8
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CORSIKA up to version 7 has been the most-used Monte Carlo code for simulating extensive air showers for more than 20 years. Due to its monolithic, Fortran-based software design and hand-optimized code, however, it has become difficult to maintain, adapt to new computing paradigms and extend for more complex simulation needs. These limitations led to the CORSIKA 8 project, which constitutes a complete rewrite of the CORSIKA 7 core functionality in a modern, modular C++ framework. CORSIKA 8 has now reached a state that we consider ``physics-complete'' and a stability that already allows experts to engage in development for specific applications. It already supports the treatment of hadronic interactions with Sibyll 2.3d, QGSJetII-04, EPOS-LHC and Pythia 8.3 and the treatment of the electromagnetic cascade with PROPOSAL 7.6. Particular highlights are the support for multiple interaction media, including cross-media particle showers, and an advanced calculation of the radio emission from particle showers. In this contribution, we discuss the design principles of CORSIKA 8, give an overview of the functionality implemented to date, the validation of its simulation results, and the plans for its further development.
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## Nikolaos Karastathis, Remy Prechelt, Juan Ammerman-Yebra and Tim Huege for the CORSIKA 8 Collaboration (poster, PoS(ICRC2023)425)
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## Nikolaos Karastathis, Remy Prechelt, Juan Ammerman-Yebra and Tim Huege for the CORSIKA 8 Collaboration (poster, PCRI1-29, Jul27+28, PoS(ICRC2023)425)
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### Simulating radio emission from air showers with CORSIKA 8
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The main focus of this talk is the propagation of optical, i.e. fluorescence and Cherenkov, photons through low density inhomogeneous media in the context of the next generation CORSIKA8 simulation framework. 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 in 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.
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## Juan Ammerman, Uzair Latif, Nikolaos Karastathis, Tim Huege for the CORSIKA 8 Collaboration, Simon de Kockere (poster, PCRI1-34, PoS(ICRC2023)442)
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## Juan Ammerman, Uzair Latif, Nikolaos Karastathis, Tim Huege for the CORSIKA 8 Collaboration, Simon de Kockere (poster, PCRI1-34, Jul27+28, PoS(ICRC2023)442)
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### Simulations of cross media showers with CORSIKA 8
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The CORSIKA 8 project aims to develop a versatile and modern framework for particle shower simulations that meets the new needs of experiments and addresses the caveats of existing codes. Of particular relevance is the ability to compute particle showers that pass through two or more different media, of varying density, in a single run within a single code. CORSIKA 8 achieves this flexibility by using a volume tree that specifies volume containment, allowing one to quickly query to which medium a point belongs. Thanks to this design we are able to construct very specific environments with different geometries and media. As an example, we demonstrate this new functionality by running particle showers penetrating from air into Antarctic ice and validating them with a combination of the well-established CORSIKA 7 and Geant 4 codes.
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## Alexander Sandrock, Jean-Marco Alameddine, and Felix Riehn for the CORSIKA 8 collaboration
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### Validation of Electromagnetic Showers in CORSIKA 8 (talk, CRI19-06, PoS(ICRC2023)393)
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### Validation of Electromagnetic Showers in CORSIKA 8 (talk, CRI19-06, Aug2, PoS(ICRC2023)393)
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[Read-only overleaf link](https://www.overleaf.com/read/cnngwxchxrdz)
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