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cumulative 1000 events raw-peds with pixel intensit threshold 20,50,100ADU:
Comparison raw-peds for dark and signal
Images from dark run 134 and signal run 137 ueddaq02
Dark run 134 step 2-FL normal event 30
- mean ~0 ADU
Signal run 137 (step 0) in FL normal event 30
- mean ~6 ADU
Signal run 137 (step 0) in FL outlyer event 32
- mean ~-20 ADU
Issues
- mean value rising during 1000 events of the run 137 step 2/FL
- pedestals for dark are evaluated correctly
- baseline for signal has an offset ~5ADU relative to dark
- there are outliers in signal too which shift mean ~ -25 ADU
Summary
- pedestals
- In runs 134 (dark) and 137 (signal) the difference between old and new pedestals calibration algorithm is indistinguishable. This means that run 134 does not have significant bias of pedestals due to outlying events.
- plots for (raw-peds) and calib are different due to the gain factor only
- common mode correction
- plays important role to eliminate intensity fluctuation in banks
- common mode correction for short rows can easily overcorrect data in bright signal region
- noise seems different in "left" and "right" ASICs
- event with threshold 100 keV in run 137 with new pedestals does not show entire banks ..., although presentation might be different
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