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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

ADTX Threshold Scan

RIKEN/RBRC

Itaru Nakagawa


Run13 adtx threshold scan
Run13 ADTX Threshold Scan

  • March 3, 2013

  • MUID1D

  • HV=Run12 Nominal Setting

  • MuTrige-Log entry=#1127



Fake hit rates south
Fake Hit Rates (South)

Logic=AND2

Logic=OR

Logic=OR

Octant-3 doesn’t necessarily stands out

-> AND2 effect?


Sanghwa s gap by gap threshold scan
Sanghwa’s Gap-by-Gap Threshold Scan

South St-1 Oct-2

Gap-2 Noisy

Feb.2013


Fake hit rates north
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]




Accidental coincidence fake sg1 trigger
Accidental Coincidence Fake SG1 Trigger

  • SG1 ~ R_st1 x R_st2 x R_st3



Accidental sg1 prediction1
Accidental SG1 Prediction

North Octant-1 Stands out, but not Octant-4


Sg1 rate octant fraction south
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


Sg1 rate octant fraction north
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




Load map to threshold optimization
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


Run12 eff 95 config
Run12 Eff=95% Config





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