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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