DD4hep Developers Meeting

Thursday 7 Jul 2022, 15:30 → 16:00 Europe/Zurich

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Andre Sailer (CERN), Markus Frank (CERN)

Please Join DD4hep developer's meeting via Zoom

Present:  S. Banerjee, M. Frank, J.Smiesko, A. Sailer, P. Suryadevara

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) PluginFactoryBase::make_return problem with longs (Issue 875)
1.4) 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.
1.5) DDDigi TBB code needs migration to new oneAPI TBB interfaces (Issue 901):
       Clash between Intel oneapi TBB and classic TBB.
       -- Wouter promised to look into.
1.6) Issue 909: ddsim gets stuck infinitely on some events (reported by T. Madlehner).
        Infinite loop due to particle decaying to itself. This also may be a generator problem.
1.7) Issue 913: XML parsing with non-standard linux-locale.


2)    Closed issues and fixed problems
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2.1) PR 917: Improve printout if conditions cannot be resolved

3) Round table
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3.1)  Markus:     See above.
3.2)  Andre:        PR 922 is merged. PR 920 need further investigations.
3.3)  Sunanda:    Tubs in CMS. There is some confision between the ROOT and G4
                           conventions of the usage startPhi/endPhi and startPhi/deltaPhi.
                           Not considered as a bug.
3.4)  Jurai:          Working for FCC, looking into description for liquid argon calorimeter
                           description in DD4hep for Pandora.

4) AOB
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Next meeting:   21. July 2022
 

15:30 → 15:50 Around the table