Upgrade II Open Questions for sub-detectors

The following questions are the outcome of the Upgrade II roundatble organized during the DD4hep Training

Choice of sensdetID

Why is sensdetID in the MC hits? Gloria has raised the question for Upgrade II . We need to set a rule on the granularity allowed for sensitive volume IDs and agree within the sub-detectors groups. The study of the readout should be done in Boole and left out from Gauss. Collect experience in some guidelines to be coherent with approaches. Please let us know which is the situation for your sub-detector in terms of sensitive detector IDs and volumes and the tools to read them at the detector level.

Spillover

Is your sub-detector sensitive to spillover and how many bunch-crossing are you sensitive to? Please let us know if from Data you see that you are sensitive, in order to optimise CPU usage and cost in terms of generating events.

Special background and/or Geant4 configuration

Is there some background and/or special Geant4 configuration important for your sub-detector? If yes, could we think about some parametrised approach that could be put in place to reduce CPU time for physics productions? Does it need particular or dedicated productions? Like for the Muon low energy background and flat spillover parametrisation or like very slow particles for the magnet station.