DD4hep Developers Meeting

Thursday 7 Nov 2024, 15:30 → 16:00 Europe/Zurich

zoom

Andre Sailer (CERN), Markus Frank (CERN)

Please Join DD4hep developer's meeting via Zoom

DD4hep Meeting November 21th, 2024

Present:  A.Sailer, M.Frank

Apologies:

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Link to minutes of previous meeting

Merged PRs

• PR       1342:  Some more test dependency management, add SignalHandler to ddsim (Andre)
• PR       1347:  Remove override warnings from DDG4 compilation (Markus)
• PR       1348:  make inline definition of insertion operator of DCH_info class (Alvaro)
• PR       1349:  PythonPlugin: replace deprecated/removed Eval with Exec (Andre)

Pending Problems

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• 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);
  

• ISSUE 1335: Uniform random picking of points on detector surfaces for noise studies
              This problem is linked to #1297 and #580 .
• ISSUE 1343: want to get a parameter into ddsim SDAction at run time
  
  Pending:
• PR1240:     Add multithreading support to ddsim
• PR1304:     SurfaceManager: lazily construct surface maps on demand (Leonhard Reichenbach)
• PR1314:     Cylinder segment surface (Armin Ilg)

Closed issues and fixed problems

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• ISSUE 1340: Not saving contributions for calorimeter hits
                        ==> explanation sorted out by Andre
• ISSUE 1344: Two sensitive surfaces in a one module. How to debug?
                        ==> explanation sorted out by Andre
• ISSUE 1345: problem to simulate Bhabha events:
                        FATAL +++ Stable particle (PDG: 11 ) with daughters! check your MC record, adapt particle.tbl file...
                        ==> explanation sorted out by Andre
• ISSUE 1346:  MCParticle parent and daughter values not matching up.
                        ==> misunderstanding sorted out by Andre

Round Table

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Andre:     NTR
Markus:  NTR

AOB

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Next meeting:   November 21th, 2024

15:30 → 15:50 Around the table