The spherical proportional counter is a novel gaseous detector, with many applications, including dark matter searches and neutron spectroscopy.
A simulation framework has been developed, which combines the strengths of the Geant4 and Garfield++ toolkits. The framework allows the properties of spherical proportional counters to be studied in detail, providing insights for detector R&D, experiment design optimisation, and data analysis and interpretation. The details of the framework will be presented, along with its performance in terms of computing resources. Representative physics results will be shown, demonstrating its predictive power. The validation of the simulation using data collected at the University of Birmingham and at the Boulby Underground Laboratory will be discussed.