DD4hep Developers Meeting

Thursday 13 Jan 2022, 15:30 → 16:00 Europe/Zurich

zoom

Andre Sailer (CERN), Markus Frank (CERN)

Please Join DD4hep developer's meeting via Zoom

Present:  M.Frank, A.Sailer, C. Vuosalo

1) Pending problems

1.1) Pending problems reported by Sang Hyun Ko:
     - Cannot setup Birk's constant as material property.
     - No analogy to G4PVParametrized. Unclear if a solution is possible.
1.2) Add GFlash parameterisation to DDG4 (issue #802)
1.3) Problems with ROOT-python compatibilities (issue 842)
       ==> Waiting for Paul to provide a PR
1.4) DDG4: Isotropic gun distribution also forces uniform momentum distribution #862
       ==> Waiting for Wouter to provide PR
1.5) DD4POD: Waiting for PR from Whitney
1.6) PluginFactoryBase::make_return problem with longs (Issue 875)
1.7) ROOT issue: for G4 units the radiation/interaction length is wrong by a factor 10
       -- For CMS this problem does not show up.
       -- Should only enter AFTER simulation (Geant4 materials do not have the radiation length as input)
       -- Need to address this issue early next year.

2)    Closed issues and fixed problems
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2.1) Adopt build for released version of Geant4 11.0.0 (PR #888, Markus)

3) Round table
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3.1)  Markus:         Please see above
3.2)  Carl:               -- Will test the build with Geant4 11.0.0.
                                  Andre will include the build with Geant4 11 into the LCG test builds.
                               -- CMS uses radiation and interaction lengths from Geant4.
                                  The problem does not occur for CMS.
                               -- Incorporated the latest changes in DD4hep and do not see problems.
3.3) Andre:             Answered issue for parallel volumes popping up during the Xmas break.

4) AOB
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Andre:                    In contact with Paul concerning issues with ACTS. Will perhaps add some annotations to certain objects.

 

Next meeting:   27.January 2022

 

15:30 → 15:50 Around the table