1. CSC Digi/RecHit Validation Calibrations & Crosstalk

2. Rick Wilkinson Effects Fetched From Calibrations u Gains u Pedestal u Pedestal Width u Correlated Noise u Crosstalk

3. Rick Wilkinson Crosstalk CSC strips have capacitance Crosstalk behaves like a differentiator circuit u 5-10% effect u proportional to slope

4. Rick Wilkinson RecHit r-  Resolution RMS resolution, in  m u CSCRecHit : doesn’t use calibrations u CSCRecHitB: uses calibrations Crosstalk can double or triple resolution u Even though it’s a 5-10% effect! u Pulls the fit towards the second-highest strip ME1/1ME1/2ME1/3ME2/1ME2/2ME3/1ME3/2ME4/1CSCRecHit Sim w/ DB 160316778597553643578720 CSCRecHitB 107164307296301309305334 CSCRecHit Sim no DB 115168376350575357561353 CSCRecHitB 94189380334409352382349 CSCRecHit no DB, xtalk 96109172187207177187183

5. Rick Wilkinson Conclusions u Validation done for Digis & RecHits under 140 and 150pre3, with and without calibrations database u Crosstalk has a surprisingly big effect on resolution è Even though it’s not a random effect! u Need to study è How to simulate it è How accurate and stable calibrations are è How to best correct for it in reconstruction