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DOE OSTI · 2549326

Geant4 Event Biasing and Fast Simulation

Jun, Soon Yung [Fermilab] (ORCID:0000000333706109)
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Abstract

Geant4 offers advanced event biasing techniques to significantly accelerate simulations involving rare events. Various biasing methods, such as leading particle selection, cross-section biasing, radioactive decay enhancement, and bremsstrahlung splitting, enable efficient event sampling, though they require careful handling. Additionally, Geant4 provides a Fast Simulation Interface, allowing the replacement of standard processes in specific region and for selected particles, enabling faster execution or external code integration. Applications of fast simulation include electromagnetic shower modeling in calorimeters, machine learning inference, and offloading tasks to specialized hardware like GPUs, making Geant4 a powerful tool for computationally demanding simulations.

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Jun, Soon Yung [Fermilab] (ORCID:0000000333706109). 2025-03-31. Geant4 Event Biasing and Fast Simulation. https://doi.org/10.2172/2549326

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