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ADTX Threshold Scan

ADTX Threshold Scan. RIKEN/RBRC Itaru Nakagawa. Run13 ADTX Threshold Scan. March 3, 2013 MUID1D HV=Run12 Nominal Setting MuTrig e-Log entry=#1127. Run13 ADTX Threshold Scan. Fake Hit Rates (South). Logic=AND2. Logic=OR. Logic=OR. Octant-3 doesn’t necessarily stands out

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ADTX Threshold Scan

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  1. ADTX Threshold Scan RIKEN/RBRC Itaru Nakagawa

  2. Run13 ADTX Threshold Scan • March 3, 2013 • MUID1D • HV=Run12 Nominal Setting • MuTrige-Log entry=#1127

  3. Run13 ADTX Threshold Scan

  4. Fake Hit Rates (South) Logic=AND2 Logic=OR Logic=OR Octant-3 doesn’t necessarily stands out -> AND2 effect?

  5. Sanghwa’s Gap-by-Gap Threshold Scan South St-1 Oct-2 Gap-2 Noisy Feb.2013

  6. Fake Hit Rates (North) Logic=AND2 Logic=OR Logic=OR North Station-3 Octant-1 stands out Vertical Axis : (average hits/strip)/total#of_trigger / 106ns [Hz]

  7. Inter Station Comparison (South)

  8. Inter Station Comparison (North)

  9. Accidental Coincidence Fake SG1 Trigger • SG1 ~ R_st1 x R_st2 x R_st3

  10. Accidental SG1 Prediction

  11. Accidental SG1 Prediction North Octant-1 Stands out, but not Octant-4

  12. SG1 Rate Octant Fraction (South) Compares Actual SG1 Trigger Rates/oct from Emulator and Prediction from Fake hit rates. Run#385753 : Threshold=20mV Red Dot : Emulator Horizontal Bar : Prediction from Fake Rates

  13. SG1 Rate Octant Fraction (North) Run#385753 : Threshold=20mV • Disagree more than 3sigma. • Both plots are from same data. Why? • Deadtime? Red Dot : Emulator Horizontal Bar : Prediction from Fake Rates

  14. Inter Station Comparison (South)

  15. Inter Station Comparison (North) Normalized

  16. Load Map to Threshold Optimization • Before Run13 : Thresholds are set to be constant charge efficiencies. • Run13 Concept • R_oct1=R_oct2=R_oct3=…= R_oct8 • Raise threshold of station which has steeper response to threshold regardless of noisy source St. • Analyze Charge efficiency • Eff_AND2 -> [1 - (1-eff_g1xeff_g2)x (1-eff_g3)] • eff_g? = 0.9 => Eff_AND2=0.98 • Eff_OR -> [ 1- (1-eff)^2] • eff=0.9 => eff_OR=0.99

  17. Run12 Eff=95% Config

  18. Backup

  19. (Log)

  20. (log)

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