Geant4 Geometry and Transport Working Group Meeting

Monday 12 Jan 2026, 14:30 → 17:00 Europe/Zurich

1/1-025 (CERN)

14:30 → 15:20 Part 1 - VecGeom: Plans for 2026 - open issues, identifying priorities and 'top-level' deliverables

15:20 → 15:30 Short break

15:30 → 16:50 Part 2. Other Topics: Status and Plans for 2026

15:30 Status and Outlook

Speaker: John Apostolakis (CERN)

15:40 Goals for 2026

Recall topics mentioned in 2025:

Navigation / modelling
- Vecgeom surface-based modeller
Performance / interfaces
- Improvement of implementation of parallel voxel creation
- Overlap checking using Multi-Threading
Field:
- Robustness improvement of QSS3
- High order symplectic stepper (needs person)

Impact / Coupling with other developments (in Geometry & Transport and beyond)

See Deliverables (2024 & 2025) and potential deliverables (future)

16:30 Reports, Open Topics and Plans - roundtable

16:50 → 17:00 AOB: Other topics