Implement detector hardware threshold

[wdconinc]

Is your feature request related to a problem? Please describe. Detector hardware thresholds should be implemented in the geometry definition to ensure they are applied correctly and consistently. This is preferred over implementation at the reconstruction level.

References:

• https://wiki.bnl.gov/EPIC/index.php?title=Background
• https://docs.google.com/spreadsheets/d/1s8oXj36SqIh7TJeHFH89gQ_ayU1_SVEpWQNkx6sETKs/edit

Describe the solution you'd like This should be added to the detectors, ideally close to the geometry definition. That may not be exactly possible, though. Here are a few options:

• implementation in npsim as done for the DIRC/RICH detectors,
• implementation in geant4_setup sequences as in DD4hep/examples/CLICSiD/sim/sequence.xml.

Describe alternatives you've considered This can (also) be implemented in EICrecon digitization algorithms.

[wdconinc]

https://github.com/wdconinc/DD4hep/commit/510ea9326c3604b94b0aa855c13ec13a228e1ad2

[wdconinc]

https://github.com/eic/npsim/pull/9

[wdconinc]

Merged in https://github.com/eic/npsim/pull/9.