DD4hep Developers Meeting



Andre Sailer (CERN), Markus Frank (CERN)

Please Join DD4hep developer's meeting via Zoom

DD4hep Developers Meeting
Zoom Meeting ID
Marko Petric
Alternative host
Andre Sailer
Useful links
Join via phone
Zoom URL

Present:  M.Frank, P.Gessinger-Befurt, T.Madlener, A.Sailer

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.
1.8) Proposal to configure special material properties (Birk's constant.) (Issue 890)

2)    Closed issues and fixed problems

3) Round table
3.1)  Markus:          ----
3.2) Andre:             New DD4hep release 1.20
3.3)  Thomas:          ----
3.4)  Paul:               They need to attach ACTS specific information to the DetElements of DD4hep. This is on one hand very useful, but on the other hand creates a strong dependency of the entire framework on ACTS. Possible solution was found to add a map<string, double> created from additional xml elements.

4) AOB


Next meeting:   10.February 2022

There are minutes attached to this event. Show them.
    • 3:30 PM 3:50 PM
      Around the table 20m