trigger bias study at test bench data
DESCRIPTION
Trigger Bias Study at Test Bench Data. RIKEN/RBRC Itaru Nakagawa. Recompile Code. Recompiled ~/work/Ana/mutrver01 and renewed bin/ and lib directories. After recompile. Before recompile. dat100604/bkp/feeclus02.root . dat100604/feeclus02.root . - PowerPoint PPT PresentationTRANSCRIPT
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Trigger Bias Study at Test Bench Data
RIKEN/RBRCItaru Nakagawa
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Recompile CodeRecompiled ~/work/Ana/mutrver01 and renewed bin/ and lib directories
Before recompile After recompile
dat100604/bkp/feeclus02.root dat100604/feeclus02.root
They are absolutely identical. Events in fADC[2]<fADC[0] region are still missing.
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Timing Tune with Calibration Pulse
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Calibration Pulsedefault Reflection?
dat100615/pulse001.cdatdat100615/pulse001.cdat
Measurements are done without recap clamp
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Timing Check
dat100615/pulse002.cdat
dat100615/pulse002.cdat
dat100615/pulse003.cdat
dat100615/pulse003.cdat
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Timing Check
dat100615/pulse004.cdat
dat100615/pulse004.cdat
dat100615/pulse005.cdat
dat100615/pulse005.cdat
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Timing Check
dat100615/pulse006.cdat
dat100615/pulse006.cdat
dat100615/pulse007.cdat
dat100615/pulse007.cdat
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Timing Check
dat100615/pulse008.cdat
dat100615/pulse008.cdat
dat100615/pulse009.cdat
dat100615/pulse009.cdat3.8us
3.6ustrigger
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Backup Scintillator Trigger
f=+3.5cmr=27.5cm
Chamber
90 Sr
Trigger scintillator
collimator
Trigger scintillator
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Trigger Timing w/ 90Srdelay:2BCLK
Back Up Scintillator Trigger
Strip#26 (E47)
Difficult to observe correlated signal with trigger on scope.
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ADC[2] .vs ADC[0]
dat100614/feeclus002.root dat100614/feeclus003.root
ScintillatorHV=-1600V
ScintillatorHV=-1700V
dat100614/feeclus004.rootScintillatorHV=-1600V
20k events500k events
50k events
Only ADC2=ADC0 exists in largeADC region.
Perhaps chamber penetrated trigger maynot cause large pulse in chamber?
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Timing Tune with Cosmic
data012.cdat
data012.cdat
data013.cdat
3.8us
data013.cdat
Default timing so far.
trigger
Strip 26
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More Statistics w/ Cosmic
dat100616/feeclus002.root
500k events3.8us
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90Sr Source (Delay=3.8us)
dat100615/feeclus014.root
dat100616/feeclus003.root
ScitillatorHV=-1700VThreshold=-200mV
ScitillatorHV=-1800VThreshold=-100mV
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Summary
• Trigger timing was tuned with calibration pulse. • Scintillator trigger timing was also optimized
based on calibration timing (3.8us).• ADC2 .vs ADC0 correlation shows uniform
distribution below MIP region (ADC<200). (Should be ADC2~5*ADC0 if correlated timing)
• Beyond MIP region, only ADC2=ADC0 events appears. Now understood.