G4VR: A Virtual Reality Implementation of GEANT4

GEANT4 is a widely used toolkit to simulate particle interactions in matter and is crucial to many particle physics experiments. Its visualization system enables 3D viewing of event displays but has limited native scope for immersion and precise understanding of event chronology. To this end, we are developing G4VR - a novel VR-based application - to visualize GEANT4 event displays by direct integration with a new G4XR driver written for GEANT4. G4VR offers an immersive understanding of particle trajectories and kinematics and precise time-based tracking of trajectories. Detailed information on particle tracks is accessible at step-level granularity, and cumulative energy depositions in matter are recorded. Time-based tracking allows users to examine the exact chronology of interactions and includes an animation of the entire event called "Movies." In conjunction, the G4XR driver enables any experiment to be loaded into G4VR with minimal user intervention. G4VR additionally offers built-in PET, sampling calorimeter, and double-arm spectrometry event displays to explore its various functionalities. These developments are a novel contribution to the GEANT4 visualization system, offering greater flexibility, understanding, and verbosity for simulated events.