CommonDet For Calorimetry New Features Grouping DAQ readouts done for HCAL DetLayers for track navigation not done, should be easy.needed? ECAL implementation Implementation details Testing Release

Mapping CommonDet to Calo Master Readout Unit for digis: First try: One for ECAL, one for HCAL, one for preshower Eventually: Mimic the DAQ readout front ends DetUnit (implies one Slave Readout for digis) First try… one per: ECAL crystal HCAL tower Preshower plane Eventually: one per 5x5 ECAL tower crystals would be channels within the readout

SimHits and RecHits PROBLEM: Calo SimHits and RecHits are different than the ones used in Tracker and Muon. We cannot use CommonDet’s SimDet class, or the RecHit handling in DetUnit Maybe these need to be rewritten to be generic, templated on the SimHit or RecHit? We can use Calo’s old methods for now.

Digitization Old code digitizes entire subsystems at once Reasonable, because ECAL selective readout needs to know nearby crystals before deciding which ones to keep Reusing the old code wasn’t hard Just had to factor some code out of the PRecDet class, because we get PRecDet from the Slave Readout Maybe HCAL towers (at least) should be digitized one-by- one, rather than all at once? Unrolling all those nested loops into reusable methods would be a good thing to do, anyway.

Current Status Done: DetUnits and digitization infrastructure written (Rick) Implemented for HCAL (Rick) & preshower (Vladimir) Doesn’t get detector Bounds right yet, but not needed yet Old structure still works, too. Not CVS-committed yet, just sharing tarballs Near-term to do list: ECAL Make DetLayer structures for navigation Make CaloItr use new readouts, so users won’t notice the change Release into ORCA