Minutes of 16 November 2010 Meeting of Geant4 Technical Forum

Editor: A. Morsch, 20 November 2010


- Starting at 16:40


Updates on open requirements
============================
 + See slides
 Recent Requirements
 + #2801 Light anti-Ion Transport: Good progress on recent request from ALICE 
 + #2703 Accepted and solution proposed, will be included in plans for 2011 
 + #2701 G. Corti: no feedback from LHCb yet 
 Recent Updates 
 + #2501 CMS (S. Banerjee) confirms: request not longer an issue. 
 
Geant4 9.4 release and latest patches
=====================================

Updates on Electromagnetic Physics
=================================
 + See slides
 Discussion on slide 20:
 John: Option0 is default. Urban model used for e+e- WentzelVI for muon
 transport.
 No effect on overall computing time (typical LHC event); 10% for pure muon
 transport.

Updates on Hadronic Physics 
===========================
 + See slides
 - To slide 4: Longitudinal showershapes have improved significantly between
 7.1 and 9.3 but still work to do.
 - To slide 5: J. Apostolakis: Following the improvements made on the FTF
 model, QGS will be revisited and revised.
 CMS is concerned about performance. D. Wright: no significant cost of
 performance.
 

Users' presentations
====================
LHCb
==== 
 + See slides 
 - To slide 7:
 "G4 experts (V.I.) to set up a customized EM PL with correct treatment of
 MCS for all particles"
 Comment V.I: Technically possible but no promise
 - To slide 8:
 Vladimir: Variation of calo calibration parameters with G4 release not
 observed in simplified test set-ups. 
 Have trending since G4 7.0 and variation