30th Geant4 Collaboration Meeting

from Monday, 20 October 2025 (08:00) to Friday, 24 October 2025 (18:00)
Charles B. Wang Center (301)

        : Sessions
    /     : Talks
        : Breaks
20 Oct 2025
21 Oct 2025
22 Oct 2025
23 Oct 2025
24 Oct 2025
AM
08:30
Registration (until 09:00)
09:00
Plenary - Krzysztof Genser (Fermi National Accelerator Laboratory (US)) Alvaro Tolosa-Delgado (CERN) (until 10:30)
09:00 Hosts Opening Remarks  
09:10 Spokes Opening Remarks  
09:20 Open and new requirements - LHC and other HEP Energy Frontier experiments - Marilena Bandieramonte (University of Pittsburgh (US))  
09:34 Open and new requirements - HEP intensity and cosmic frontier experiments - Krzysztof Genser (Fermi National Accelerator Laboratory (US))  
09:48 Open and new requirements - Nuclear Physics experiments - Luis Gerardo Sarmiento Pico  
10:02 Open and new requirements - Medical and biological science - Susanna Guatelli  
10:16 Open and new requirements - Space science and engineering - Dr Giovanni Santin Giovanni Santin  
10:30 --- break ---
11:00
Plenary - Benjamin Morgan (University of Warwick (GB)) Alberto Ribon (CERN) (until 12:30)
11:00 Status of the 4th general paper - Andrea Dell'Acqua (CERN)  
11:30 Proposal for the Physics Lists Working Group for 2026 - Alberto Ribon (CERN)  
11:50 Request to add custom physics models in G4PhysicsModelCatalog - Alberto Ribon (CERN)  
12:10 Integration/Deprecation of features in the Geant4 Toolkit - Benjamin Morgan (University of Warwick (GB))  
09:00
Plenary - Francesco Romano (Universita & INFN, Bari) Ivana Hrivnacova (Université Paris-Saclay (FR)) (until 10:30)
09:00 Extended Examples: General overview and WP status - Ivana Hrivnacova (Université Paris-Saclay (FR))  
09:15 New dna radial and phasespace examples - Sebastien Incerti (CNRS/IN2P3)  
09:25 New dna molcounters examples - Christian Velten (Albert Einstein College of Medicine)  
09:35 New dna microtrack example - Dr Miguel Antonio Cortes-Giraldo (Universidad de Sevilla)  
09:45 Recent Updates and Future Developments on Hadrontherapy and Radiobiology example - Alberto Sciuto  
09:55 Advanced Examples: General overview and WP status - Francesco Romano  
10:10 Update about the example on use of IAEAphsp files - Dr Miguel Antonio Cortes-Giraldo (Universidad de Sevilla)  
10:20 Minibeam dosimetric studies using the eFLASH_radiotherapy and exp_microdosimetry examples - Giuliana Milluzzo  
10:30 --- break ---
11:00
Plenary - John Apostolakis (CERN) Andrei Gheata (CERN) (until 12:30)
11:00 Update on VecGeom modellers - Andrei Gheata (CERN)  
11:20 ORANGE geometry construction 
for Geant4 - Seth Johnson (Oak Ridge National Laboratory (US))  
11:40 An update on parallel geometry initialisation - John Apostolakis (CERN)  
12:00 An update on the QSS integration for magnetic field propagation - Rodrigo Castro (ETH Zurich) Rodrigo Daniel Castro (Universidad de Buenos Aires (AR))  
09:00
Parallel 1 - Tran Hoang (CNRS, France) Sebastien Incerti (CNRS/IN2P3) (until 10:30)
09:00 Development of Geant4-DNA functionality in the physical and chemical stage for radiation protection in space - Jay Archer (University of Wollongong)  
09:20 Ion transport in Geant4-DNA - Matvei Vologzhin (Tomsk State University (RU))  
09:40 Monte Carlo method for the angular distribution of the e−e+ pair created in the µ-nucleus collision - Gerardo Depaola  
09:00
Vis UI Parallel - Joseph Perl John Allison (until 10:30)
09:00 UI and Vis discussion: Introduction - John Allison  
09:10 ToolsSG-GLES on OpenGL-3.2 - Guy Barrand  
09:20 Transparency slider and Zoom-To-Cursor - Andrea Barresi  
09:30 UI and Vis discussion - Laurent Garnier  
10:30 --- break ---
11:00
Plenary -Prof. Vladimir Ivantchenko (CERN) Fada Guan (until 12:30)
11:00 EM physics status for 11.4 and beyond - Prof. Vladimir Ivantchenko (CERN)  
11:20 The automatisation of the execution of the G4-Med tests - Carlo Mancini Terracciano  
11:40 Status of Geant4-DNA - Sebastien Incerti (CNRS/IN2P3)  
12:00 Progress for simulation of chemistry - Tran Ngoc Hoang (IN2P3)  
09:00
Technical Forum (until 10:30)
10:30 --- break ---
11:00
Technical Forum (until 12:30)
09:00
Plenary - Alexander Howard (Imperial College (GB)) Luis Gerardo Sarmiento Pico (until 10:30)
09:00 Status and perspectives of Documentation and Outreach - Luis Gerardo Sarmiento Pico Alexander Howard (Imperial College (GB))  
09:45 Discussion - Alberto Ribon (CERN)  
10:30 --- break ---
11:00
Plenary - Benjamin Morgan (University of Warwick (GB)) Alberto Ribon (CERN) (until 12:30)
11:00 Discussion - Alberto Ribon (CERN)  
11:30 Release schedule - Dr Gabriele Cosmo (CERN)  
11:40 Announcement of 31st Geant4 Collaboration Meeting - Pedro Arce (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))  
11:50 Host closing remarks - Makoto Asai  
12:00 Closing remarks - Alberto Ribon (CERN)  
PM
12:30 --- lunch break ---
14:00
Plenary - Seth Johnson (Oak Ridge National Laboratory (US)) Benjamin Morgan (University of Warwick (GB)) (until 15:30)
14:00 Geant4 User Support Infrastructure - Benjamin Morgan (University of Warwick (GB))  
14:15 Geant4's Git Workflow Policy - Benjamin Morgan (University of Warwick (GB))  
14:30 Geant4 Development/Testing Tools Update - Benjamin Morgan (University of Warwick (GB))  
14:50 Maintenance topics in Core Categories for 2026 - Benjamin Morgan (University of Warwick (GB))  
15:30 --- break ---
16:00
Plenary (until 17:30)
17:30
Reception (until 19:30) (Zodiac Lobby)
12:30 --- lunch break ---
14:00
Plenary - Igor Semeniouk (Centre National de la Recherche Scientifique (FR)) Marc Verderi (Centre National de la Recherche Scientifique (FR)) Pedro Arce (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES)) Makoto Asai (until 15:30)
14:00 Specialized Tracking with G4VTrackingManager - Jonas Hahnfeld (CERN & Goethe University Frankfurt)  
14:25 Updates on kernel - Makoto Asai  
14:45 Status of Reverse MC and usage in GRAS - Dr Laurent Desorgher (IRA CHUV)  
15:10 Status of channeling - Alexei Sytov (Universita e INFN, Ferrara (IT))  
15:30 --- break ---
16:00
Parallel 1 - Luis Gerardo Sarmiento Pico Alberto Ribon (CERN) (until 17:30)
16:00 New method to make XS data library for neutrons - Andrei Berngartd Prof. Vladimir Ivantchenko (CERN)  
16:20 Validation of Geant4 fragmentation models for hadrontherapy beyond carbon ions - Kristie Moore (University Wollongong, Australia)  
16:40 Development of IAEA cross sections modelling isotope production from protons, for medical physics applications - Ilan Eliyauh  
17:00 Determination of simulation parameter values for Light-Ion QMD - Yoshihide Sato  
16:00
Vis UI Parallel -Dr Gabriele Cosmo (CERN) Makoto Asai (until 17:30)
12:30 --- lunch break ---
14:00
Plenary - Soon Yung Jun (FNAL) Julia Yarba (until 15:30)
14:00 Update and Plan of G4CPT/CI-Performance - Soon Yung Jun (Fermi National Accelerator Lab. (US)) Julia Yarba  
14:18 Computing Performance Results and Issues: CMS - Prof. Vladimir Ivantchenko (CERN)  
14:27 Computing Performance Results and Issues: ATLAS - Marilena Bandieramonte (University of Pittsburgh (US))  
14:36 Computing Performance of Geant4 Medical Applications - Dr Miguel Antonio Cortes-Giraldo (Universidad de Sevilla)  
14:54 ePIC Detector Simulation at Scale - Maxim Potekhin (Brookhaven National Laboratory (US))  
15:12 Computing Performance Profiling and Geant4 simulation Activities at IBS - Kihong Park (IBS)  
15:30 --- break ---
16:00
Plenary - Joseph Perl John Allison (until 17:00)
16:00 Vis and UI Status October 2025 - John Allison  
16:10 Geometry slider and other developments - Andrea Barresi  
16:20 OpenGL-3 and all that - Guy Barrand  
16:30 VTK and Virtual Reality - Stewart Boogert  
16:40 Vis and UI Discussion - Laurent Garnier  
18:00
Banquet (until 21:00)
12:30 --- lunch break ---
14:00
Plenary - Seth Johnson (Oak Ridge National Laboratory (US)) Marc Verderi (Centre National de la Recherche Scientifique (FR)) (until 15:30)
14:00 AdePT - Severin Diederichs (CERN)  
14:30 Celeritas - Seth Johnson (Oak Ridge National Laboratory (US))  
15:00 Geant4 R&D Assessment and discussion - Marc Verderi (Centre National de la Recherche Scientifique (FR))  
15:30 --- break ---
16:00
Plenary - Luis Gerardo Sarmiento Pico Alberto Ribon (CERN) (until 17:30)
16:00 Status of Hadronic Physics - Alberto Ribon (CERN)  
16:20 Developments for pre-compound model and de-excitation module - Nikita Chalyi Prof. Vladimir Ivantchenko (CERN)  
16:40 Update on Fluka-Cern - Gabrielle Hugo (CERN)  
14:00
Steering Board meeting (until 17:00)