Public Minutes of 146th Steering Board, 9th October 2026

Present: A. Ribon, B. Morgan, K. Genser, L. Pandola, A. Howard, J. Yarba, L.G. Sarmiento Pico, S. Diederichs, I. Hrivnacova, I. Semeniouk, A. Gheata, J. Apostolakis, G. Cosmo, A. Tolosa Delgado, M. Asai, M. Verderi, S. Incerti, M.A. Cortes-Giraldo, F. Romano, S. Okada, V. Ivanchenko, L. Garnier, W. Pokorski (number: 23) Excused: D. Sawkey

1. Collaboration Meeting in Bordeaux on 5-9 October

  • The week before, on September 30th, a Technical Forum was held, with the main focus of reviewing and reassess the User Requirements.
  • A review of Geant4 is expected for 2027, as required by the Oversight Board.
  • The next Collaboration Meeting will be held in Nagoya, Japan, on 18-22 October 2027.

2. Geant4 release 11.5

  • The minor release 11.5 is expected for December 4th.

3. Events

3.1 Past Events

  • 13th Geant4 International School, ELI Beamlines Facility, Prague (Czech Republic), 27-31 July 2026, https://indico.eli-laser.eu/event/231/
  • Geant4 IN2P3 Tutorial – Sept 21–25, 2026, Lyon, https://geant4-ed-project.pages.in2p3.fr/geant4-ed/
  • 68th Geant4 Technical Forum, CERN, Geneve (Switzerland), 30 September 2026, https://indico.cern.ch/event/1723933/
  • 31st Geant4 Collaboration Meeting, Bordeaux (France), 5-9 October 2026, https://indico.in2p3.fr/event/39528/

3.2 Next Events

  • Geant4 Advanced Course at CERN, Geneve (Switzerland), 2-6 November 2026, https://indico.cern.ch/e/geant4_advanced_course_2026
  • Geant4 Tutorial, Tsukuba (Japan), 9-11 November 2026 (in Japanese), https://wiki.kek.jp/x/X4CgJ
  • Geant4 and Geant4-DNA tutorial, Daejeon (Korea Republic), 30 November - 5 December 2026
  • Geant4 Tutorial Course at JLab, Newport News, Virginia (USA), 7-11 December 2026, https://indico.jlab.org/event/1087/overview
  • 6th Geant4 International User Conference at the Physics - Medicine - Biology frontier, Mooloolaba, Queensland (Australia), 8-11 February 2027, https://indico.esa.int/e/g4suw2027
  • Geant4-DNA tutorial, KEK, Tsukuba (Japan), 11 March 2027 (in japanese)
  • 16th Geant4 Space Users Workshop, ESA/ESTEC, Noordwijk (The Netherlands), 9-11 June 2027, https://indico.esa.int/e/g4suw2027

Meeting Date Friday, October 9, 2026 - 14:00