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30th Geant4 Collaboration Meeting

20–24 Oct 2025
Charles B. Wang Center
US/Eastern timezone

Contribution List

75 / 75
1. Hosts Opening Remarks
20/10/2025, 09:00
2. Spokes Opening Remarks
20/10/2025, 09:10
3. Open and new requirements - LHC and other HEP Energy Frontier experiments
Marilena Bandieramonte (University of Pittsburgh (US))
20/10/2025, 09:20
4. Open and new requirements - HEP intensity and cosmic frontier experiments
Krzysztof Genser (Fermi National Accelerator Laboratory (US))
20/10/2025, 09:34
5. Open and new requirements - Nuclear Physics experiments
Luis Gerardo Sarmiento Pico
20/10/2025, 09:48
6. Open and new requirements - Medical and biological science
Susanna Guatelli
20/10/2025, 10:02
7. Open and new requirements - Space science and engineering
Dr Giovanni Santin, Giovanni Santin
20/10/2025, 10:16
8. Status of the 4th general paper
Andrea Dell'Acqua (CERN)
20/10/2025, 11:00
58. Proposal for the Physics Lists Working Group for 2026
Alberto Ribon (CERN)
20/10/2025, 11:30
21. Request to add custom physics models in G4PhysicsModelCatalog
Alberto Ribon (CERN)
20/10/2025, 11:50
22. Integration/Deprecation of features in the Geant4 Toolkit
Benjamin Morgan (University of Warwick (GB))
20/10/2025, 12:10

Over the years Geant4 has integrated a wide range of features, capabilities, and examples. Many of these are now unmaintained or otherwise obsolete. A proposal is made for future integration, deprecation and removal of features to ensure the quality of the toolkit is maintained and is sustainable over the lifetimes required by its major stakeholders.
52. Geant4 User Support Infrastructure
Benjamin Morgan (University of Warwick (GB))
20/10/2025, 14:00
53. Geant4's Git Workflow Policy
Benjamin Morgan (University of Warwick (GB))
20/10/2025, 14:15
54. Geant4 Development/Testing Tools Update
Benjamin Morgan (University of Warwick (GB))
20/10/2025, 14:30
55. Maintenance topics in Core Categories for 2026
Benjamin Morgan (University of Warwick (GB))
20/10/2025, 14:50
36. Extended Examples: General overview and WP status
Ivana Hrivnacova (Université Paris-Saclay (FR))
21/10/2025, 09:00
37. New dna radial and phasespace examples
Sebastien Incerti (CNRS/IN2P3)
21/10/2025, 09:15
49. New dna molcounters examples
Christian Velten (Albert Einstein College of Medicine)
21/10/2025, 09:25
38. New dna microtrack example
Dr Miguel Antonio Cortes-Giraldo (Universidad de Sevilla)
21/10/2025, 09:35
39. Recent Updates and Future Developments on Hadrontherapy and Radiobiology example
Alberto Sciuto
21/10/2025, 09:45
40. Advanced Examples: General overview and WP status
Francesco Romano
21/10/2025, 09:55
41. Update about the example on use of IAEAphsp files
Dr Miguel Antonio Cortes-Giraldo (Universidad de Sevilla)
21/10/2025, 10:10
42. Minibeam dosimetric studies using the eFLASH_radiotherapy and exp_microdosimetry examples
Giuliana Milluzzo
21/10/2025, 10:20
16. Update on VecGeom modellers
Andrei Gheata (CERN)
21/10/2025, 11:00
17. ORANGE geometry construction 
for Geant4
Seth Johnson (Oak Ridge National Laboratory (US))
21/10/2025, 11:20
59. An update on parallel geometry initialisation
John Apostolakis (CERN)
21/10/2025, 11:40
60. An update on the QSS integration for magnetic field propagation
Rodrigo Castro (ETH Zurich), Rodrigo Daniel Castro (Universidad de Buenos Aires (AR))
21/10/2025, 12:00
44. Specialized Tracking with G4VTrackingManager
Jonas Hahnfeld (CERN & Goethe University Frankfurt)
21/10/2025, 14:00
45. Updates on kernel
Makoto Asai
21/10/2025, 14:25
46. Status of Reverse MC and usage in GRAS
Dr Laurent Desorgher (IRA CHUV)
21/10/2025, 14:45
47. Status of channeling
Alexei Sytov (Universita e INFN, Ferrara (IT))
21/10/2025, 15:10
11. New method to make XS data library for neutrons
Andrei Berngartd, Prof. Vladimir Ivantchenko (CERN)
21/10/2025, 16:00
9. Validation of Geant4 fragmentation models for hadrontherapy beyond carbon ions
Kristie Moore (University Wollongong, Australia)
21/10/2025, 16:20
10. Development of IAEA cross sections modelling isotope production from protons, for medical physics applications
Ilan Eliyauh
21/10/2025, 16:40
12. Determination of simulation parameter values for Light-Ion QMD
Yoshihide Sato
21/10/2025, 17:00
33. Development of Geant4-DNA functionality in the physical and chemical stage for radiation protection in space
Jay Archer (University of Wollongong)
22/10/2025, 09:00
50. UI and Vis discussion: Introduction
John Allison
22/10/2025, 09:00

See Vis UI Discussion document - https://docs.google.com/document/d/12iSwYCVTOHq9HztWxLrV0d_2l389UY3dUTqDAQO5cAQ/edit?usp=sharing
57. ToolsSG-GLES on OpenGL-3.2
Guy Barrand
22/10/2025, 09:10
34. Ion transport in Geant4-DNA
Matvei Vologzhin (Tomsk State University (RU))
22/10/2025, 09:20
68. Transparency slider and Zoom-To-Cursor
Andrea Barresi
22/10/2025, 09:20
51. UI and Vis discussion
Laurent Garnier
22/10/2025, 09:30

Discussion
35. Monte Carlo method for the angular distribution of the e−e+ pair created in the µ-nucleus collision
Gerardo Depaola
22/10/2025, 09:40
29. EM physics status for 11.4 and beyond
Prof. Vladimir Ivantchenko (CERN)
22/10/2025, 11:00
30. The automatisation of the execution of the G4-Med tests
Carlo Mancini Terracciano
22/10/2025, 11:20
31. Status of Geant4-DNA
Sebastien Incerti (CNRS/IN2P3)
22/10/2025, 11:40
32. Progress for simulation of chemistry
Tran Ngoc Hoang (IN2P3)
22/10/2025, 12:00
24. Update and Plan of G4CPT/CI-Performance
Julia Yarba, Soon Yung Jun (Fermi National Accelerator Lab. (US))
22/10/2025, 14:00
25. Computing Performance Results and Issues: CMS
Prof. Vladimir Ivantchenko (CERN)
22/10/2025, 14:18
67. Computing Performance Results and Issues: ATLAS
Marilena Bandieramonte (University of Pittsburgh (US))
22/10/2025, 14:27
26. Computing Performance of Geant4 Medical Applications
Dr Miguel Antonio Cortes-Giraldo (Universidad de Sevilla)
22/10/2025, 14:36
27. ePIC Detector Simulation at Scale
Maxim Potekhin (Brookhaven National Laboratory (US))
22/10/2025, 14:54
28. Computing Performance Profiling and Geant4 simulation Activities at IBS
Kihong Park (IBS)
22/10/2025, 15:12
62. Vis and UI Status October 2025
John Allison
22/10/2025, 16:00
63. Geometry slider and other developments
Andrea Barresi
22/10/2025, 16:10
64. OpenGL-3 and all that
Guy Barrand
22/10/2025, 16:20
65. VTK and Virtual Reality
Stewart Boogert
22/10/2025, 16:30
66. Vis and UI Discussion
Laurent Garnier
22/10/2025, 16:40
18. AdePT
Severin Diederichs (CERN)
23/10/2025, 14:00
19. Celeritas
Seth Johnson (Oak Ridge National Laboratory (US))
23/10/2025, 14:30
20. Geant4 R&D Assessment and discussion
Marc Verderi (Centre National de la Recherche Scientifique (FR))
23/10/2025, 15:00
13. Status of Hadronic Physics
Alberto Ribon (CERN)
23/10/2025, 16:00
14. Developments for pre-compound model and de-excitation module
Nikita Chalyi, Prof. Vladimir Ivantchenko (CERN)
23/10/2025, 16:20
15. Update on Fluka-Cern
Gabrielle Hugo (CERN)
23/10/2025, 16:40
74. Status and perspectives of Documentation and Outreach
Alexander Howard (Imperial College (GB)), Luis Gerardo Sarmiento Pico
24/10/2025, 09:00
75. Discussion
Alberto Ribon (CERN)
24/10/2025, 09:45
69. Discussion
Alberto Ribon (CERN)
24/10/2025, 11:00
70. Release schedule
Dr Gabriele Cosmo (CERN)
24/10/2025, 11:30
71. Announcement of 31st Geant4 Collaboration Meeting
Pedro Arce (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))
24/10/2025, 11:40
72. Host closing remarks
Makoto Asai
24/10/2025, 11:50
73. Closing remarks
Alberto Ribon (CERN)
24/10/2025, 12:00
23. Forming the Kernel Working Group
Benjamin Morgan (University of Warwick (GB))

In 2023, the Geant4 Evolution Task Force recommended that the collaboration consider merging several smaller working groups concerned with core or "kernel" functionality into one in order to increase coherence of roles, and to better engage developers and the collaboration. With 2026 being an election year, it is the optimum time to undertake this proposal, and an outline of the structure and...
43. General discussion
56. ToolsSG-GLES on OpenGL-3.2
Guy Barrand
61. Vis and UI Status October 2025
John Allison
48. Vis driver features
John Allison
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