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USING CALIBRATIONS IN CSC SIMULATION

USING CALIBRATIONS IN CSC SIMULATION. Rick Wilkinson (Thanks to Igor, Oana, Stan, Dominique, & Stoyan)!. Effects Fetched From Calibrations. Gains Pedestal Pedestal Width Correlated Noise Crosstalk. Gains. DB has a slope (~6) and an intercept I expected a number like 2 ADC/fC

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USING CALIBRATIONS IN CSC SIMULATION

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  1. USING CALIBRATIONS IN CSC SIMULATION Rick Wilkinson (Thanks to Igor, Oana, Stan, Dominique, & Stoyan)!

  2. Effects Fetched From Calibrations • Gains • Pedestal • Pedestal Width • Correlated Noise • Crosstalk

  3. Gains • DB has a slope (~6) and an intercept • I expected a number like 2 ADC/fC • I use only the slope, with a fudge factor of 1/3 • Gas gain is arbitrary, anyway. • Am I treating ME1/1 right? • Thinner chamber. • DB gains are similar. • Higher gas gain?

  4. Pedestal Width and Correlated Noise • Off-peak samples: use pedestal widths • ~ 1.5 – 2.5 ADC • Convert to a one-sample noise in simulation • Multiply by 2 • On-peak samples: use noise matrix from DB • Do I subtract out pedestal noise in quadrature? • Noises applied to analog signal, before comparator.

  5. Pedestal Width and Correlated Noise • Off-peak samples: use pedestal widths • ~ 1.5 – 2.5 ADC • Convert to a one-sample analog noise in simulation • Multiply by sqrt(2) • Convert to fC (divide by gain) • On-peak samples: use noise matrix from DB • Do I subtract out pedestal noise in quadrature?

  6. Crosstalk • Simulation models crosstalk as: • Constant times neighboring signal (resistive) • Constant times the slope of the neighboring signal (capacitive) • Crosstalk is measured as a linear fit: • Crosstalk fraction = m * (t-tpeak) + b • b is my resistive fraction, m proportional to capacitive.

  7. Conclusion • These effects are in the 1_5_0 cycle • Easy to turn on • include "SimMuon/CSCDigitizer/data/muonCSCDbConditions.cfi” • replace muonCSCDigis.stripConditions = "Database"

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