DD4hep Developers Meeting

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Andre Sailer (CERN), Markus Frank (CERN)
Description

Please Join DD4hep developer's meeting via Zoom

DD4hep Developers Meeting
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68917133930
Host
Andre Sailer
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DD4hep Meeting March 20th, 2025

Present:     A.Sailer, M.Frank, Peter McKneown

Apologies: A.Tolosa Delgado, T.Madlehner 


Link to minutes of previous meeting

Merged PRs

  • PR1408: Update ROOT_LIBRARY_PATH in thisdd4hep.sh

Pending Problems

  • ISSUE1199: Persist hepmc vertex status code into output
                          ==> Should we eliminate Geant4EventReaderHepMC
                          ==> Decision: Geant4EventReaderHepMC will be removed
  • ISSUE1285:  Memory Consumption of Sensitive Detectors
                          ==> Should be handled as illustrated in PR1288. Intrinsic problem of the Geant4VolumeManager;
  • ISSUE1296:  DetectorImp::endDocument() called twice for some geometries?
                          ==> Unsure if it is a problem wrongly configuring multiple xml inputs.
  • ISSUE1297:  Possible to dump all available readout elements?
                         ==> Possibly a copy of unsolved ISSUE580 from Valentin about enumerating all sensitive cells.
  • ISSUE1319: Problem with regexSensitiveDetector and volume IDs
                         ==> Interesting use case for reg-ex sensitive detectors
                                 having a VolumeMgr equivalent.
  • ISSUE1320:  Replacing a Handle<Segmentation> which contains a MultiSegmentation with the underlying Segmentation
                         ===> Unclear what he really means. Questions after re-reading, calls like:
    Handle<SomeSegmentation> seg = multisegmentation->subSegmentation(cellID);
or
Segmentation* seg = multisegmentation->subSegmentation(cellID);
  • ISSUE1335: Uniform random picking of points on detector surfaces for noise studies
                This problem is linked to #1297 and #580.
  • ISSUE1373:  Add GeneratorInfo to EDM4hepReader (Andre)
    PR1371:       Read edm4hep (Andre)

  • ISSUE1399: ddsim: Vertices of tau and its decay product not matching the information in the input HEPMC file
               ---> Apparently Geant4 problem. Andre has submitted a ticket.

        Pending PRs:(no changes since last meeting):

  • PR1240:     Add multithreading support to ddsim
  • PR1304:     SurfaceManager: lazily construct surface maps on demand (Leonhard Reichenbach)
  • PR1314:     Cylinder segment surface (Armin Ilg)

        New Pending PRs:

  • PR1370:  Feature celeritas integration (Sakib Rahman/EIC)
  • PR1377:  Use canonical variables for the installation locations of libraries and binaries (Andriish)
         ==> Idea to have an additional DD4HEP_PLUGIN_PATH and remove dd4hep plugins fdrom the LD_LIBRARY_PATH

Closed issues and fixed problems

  • ISSUE1407: ddsim executes DDG4.kernel from a foreign installation 
  • ISSUE1390: Optimize Geant4VolumeManager
                          ===> Question: This PR is included in release 1.31

Round Table

Andre:       NTR
Markus:    NTR
Peter:        Question: Extensions on top of fast simulation model trigger. How to exclude certain regions from fast simulation ?
                  or: how to disable fast simulation for a certain track and its daughters.

AOB

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Next meeting:   April 3rd, 2025

There are minutes attached to this event. Show them.