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Published byMagnus O’Brien’ Modified over 9 years ago
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ADTX Threshold Scan RIKEN/RBRC Itaru Nakagawa 1
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Run13 ADTX Threshold Scan March 3, 2013 MUID1D HV=Run12 Nominal Setting MuTrig e-Log entry=#1127 2
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Run13 ADTX Threshold Scan Run#Threshold [mV]BBCnVTX [MHz]MUID1D [events] ST-1 Logic 385751401.396.5MAND2 385752601.364.5MAND2 385753201.341.6MAND2 385754101.321.3MAND2 3857551001.312.7MAND2 385756801.291.6MAND2 385757801.271.8MOR 3857581001.261.7MOR 385759601.250.5MOR 385760601.241.5MOR 385761401.231.6MOR 385762201.220.3MOR 385763101.220.5MOR 3
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Fake Hit Rates (South) Logic=AND2 Logic=OR Octant-3 doesn’t necessarily stands out -> AND2 effect? 4
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Sanghwa’s Gap-by-Gap Threshold Scan Feb.2013 South St-1 Oct-2 Gap-2 Noisy 5
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Fake Hit Rates (North) Logic=AND2Logic=OR North Station-3 Octant-1 stands out Vertical Axis : (average hits/strip)/total#of_trigger / 106ns [Hz] 6
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Inter Station Comparison (South) 7
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Inter Station Comparison (North) 8
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Accidental Coincidence Fake SG1 Trigger SG1 ~ R_st1 x R_st2 x R_st3 9
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Accidental SG1 Prediction 10
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Accidental SG1 Prediction North Octant-1 Stands out, but not Octant-4 11
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SG1 Rate Octant Fraction (South) Red Dot : Emulator Horizontal Bar : Prediction from Fake Rates Compares Actual SG1 Trigger Rates/oct from Emulator and Prediction from Fake hit rates. Run#385753 : Threshold=20mV 12
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SG1 Rate Octant Fraction (North) Red Dot : Emulator Horizontal Bar : Prediction from Fake Rates Run#385753 : Threshold=20mV Disagree more than 3sigma. Both plots are from same data. Why? Deadtime? 13
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Inter Station Comparison (South) 14
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Inter Station Comparison (North) 15 Normalized
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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 16
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Run12 Eff=95% Config 17
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BACKUP 18
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(Log) 19
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(log) 20
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