CSC Digi/RecHit Validation Calibrations & Crosstalk

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

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

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 CSCRecHitB CSCRecHit Sim no DB CSCRecHitB CSCRecHit no DB, xtalk

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