Difference between revisions of "CDC prototype afterpulses"
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Look for afterpulses by plotting ADC values with samples aligned so that the threshold-crossing is in the same bin for all events. If present they would be approx 100 samples after the start of the first pulse, with Fe55 these started to appear at around 2050V, see [[Event_pics|Event_pics]], but nothing is apparent with cosmics at 2100V. | Look for afterpulses by plotting ADC values with samples aligned so that the threshold-crossing is in the same bin for all events. If present they would be approx 100 samples after the start of the first pulse, with Fe55 these started to appear at around 2050V, see [[Event_pics|Event_pics]], but nothing is apparent with cosmics at 2100V. | ||
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Latest revision as of 10:21, 12 October 2011
Cosmics 50/50 Ar/CO2
Look for afterpulses by plotting ADC values with samples aligned so that the threshold-crossing is in the same bin for all events. If present they would be approx 100 samples after the start of the first pulse, with Fe55 these started to appear at around 2050V, see Event_pics, but nothing is apparent with cosmics at 2100V.
From an old and short 2200V run
