65th Geant4 Technical Forum

Thursday 23 Oct 2025, 15:00 → 18:30 Europe/Zurich

Charles B. Wang Center (Stony Brook University)

Alberto Ribon (CERN), Benjamin Morgan (University of Warwick (GB)), Marilena Bandieramonte (University of Pittsburgh (US))

We are pleased to announce the  65th edition of the "Geant4 Technical Forum", the forum for Geant4 users and developers, that will be held on Thursday, October 23rd, 2025 from 15:00 to 18:30 Central European Summer Time (CEST). 

This edition of the Geant4 Technical Forum is held as part of the 30th Geant4 Collaboration Meeting at Stony Brook University, New York, U.S.A.

The meeting will be held in person at the Charles B. Wang Center and online on Zoom. 

15:00 → 16:30 G4 Technical Forum - First part

Conveners: Alberto Ribon (CERN), Benjamin Morgan (University of Warwick (GB)), Marilena Bandieramonte (University of Pittsburgh (US))

15:00 Introduction

Speaker: Alberto Ribon (CERN)

introduction_G4TF23Oct2025.pdf

15:10 Geant4 Monte Carlo Applications in Medical Physics: The MD Anderson Experience

Speaker: Fada Guan

15:30 Geant4 simulations of GRETINA/GRETA at the NSCL/FRIB

Speaker: Lewis Riley (Ursinus College)

UCGretina_geant4_tech_forum_2025.pdf

15:50 Geant4 at Jefferson Lab

Speaker: Maurizio Ungaro (Jefferson Lab)

geant4_at_jlab_coll_meeting_2025.pdf

16:10 Integration of the Opticks framework into Geant4 simulation of optical photons on GPU

Speaker: Gabor Galgoczi

Opticks 2025 -- Geant4 Technical forum -- Galgoczi-1.pdf

16:30 → 17:00 Coffee/tea/cookies break

17:00 → 18:30 G4 Technical Forum - Second part

Conveners: Alberto Ribon (CERN), Benjamin Morgan (University of Warwick (GB)), Marilena Bandieramonte (University of Pittsburgh (US))

17:00 Exploring Potential Pathways to Accelerated ePIC Detector Simulations: Infrastructure R&D Activity at Brookhaven National Laboratory

Speaker: Sakib Rahman

Slides

Slides

17:20 Recent and currently ongoing developments towards Geant4 v11.4 and patch release 11.3.2: non-physics part

Speaker: Dr Gabriele Cosmo (CERN)

Geant4-Releases-11.3.p02-highlights.pdf

17:35 Recent and currently ongoing developments towards Geant4 v11.4 and patch release 11.3.2: EM physics

Speaker: Prof. Vladimir Ivantchenko (CERN)

TechForumEMPhysics.pdf

17:50 Recent and currently ongoing developments towards Geant4 v11.4 and patch release 11.3.2: Hadronic Physics

Speaker: Alberto Ribon (CERN)

g4.11.3.2_and_hadronicStatus_G4TF23Oct2025.pdf

18:05 Status of Simulation R&D

Speaker: Witold Pokorski (CERN)

RnDNews102025.pdf

18:20 Experience with migrating from Geant4 10.7.4 to 11.4 from G4CMP Consortium

Speaker: Michael Kelsey (Texas A&M University (US))

G4CMP_Migration_G4TechForum.pdf