Run 32488 channels in use
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max amp histo, threshold 5#sigma
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drift time, threshold 5#sigma
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drift time (zoomed in), threshold 5#sigma
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resolution, threshold 5#sigma
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drift time for all channels in each of 3 fadcs
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drift time for all channels in each HVB
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resolution, using different tzero for each fadc, threshold 5#sigma
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resolution, ch 101 (A4 ch 6)
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Run 32495 channels in use
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drift time, CF endplate, threshold 5#sigma
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drift time, center, threshold 5#sigma
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drift time, Al endplate, threshold 5#sigma
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Switched HVBs 3 and 5 (all electronics swapped at the chamber)
drift time, Al endplate, threshold 5#sigma
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drift time, CF endplate, threshold 5#sigma
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drift time, threshold 5#sigma
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drift time, all hits belong to track
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drift time, early hits reassigned to t0, all hits belong to track
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Event pics
These data (run 32488) were recorded using a filter in the event readout list, so only channels with 6 consecutive samples exceeding a threshold of 116 were recorded, provided that 5 channels had 8 consecutive samples over 124. (pedestal ~ 60, #sigma ~ 16)
Run 32488 events in ch 71
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Run 32488 events in ch 71 zoomed
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Ch 71 amplitude for events with and without zero-crossings (after pedestal subtraction)
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Channels with a hit before a zero-crossing in ch 71 in the same event
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Channels with a hit before another channel with a zero-crossing in the same event
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Amplitude of hit channels where hit precedes zero-crossing in another channel
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Compare resolution with channels 68 (on noisy board E4) and 148 (similar position on different board E14)
Run 32488 channel numbers
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Looking to see if zero-crossings are linked to hits in other channels. Zero-crossing time is the sample number when the adc content drops to 0 - pedestal is not subtracted. Pedestals are set to approx 60, with pedestal width ~ 16.
Run 32488 channels in use
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Channels with hit < 10 samples before zero-crossing in another channel
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Channels with tracked hit < 10 samples before zero-crossing in another channel
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Run 32495 channels in use
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Channels with hit < 10 samples before zero-crossing in another channel
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Channels with tracked hit < 10 samples before zero-crossing in another channel. Red spot = hit in 69, zero xing in 67.
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Switched HVBs 3 and 5 (first is at top, increase top to bottom, L to R)
Channels with hit < 10 samples before zero-crossing in another channel
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Channels with tracked hit < 10 samples before zero-crossing in another channel.
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Below: This run started after the CO2 had run out - more Ar reaching boards 1 and 2 (I8, I9, at the top of the chamber) and then 5 (E6)
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Channels with oscillations
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Below: Switched preamps for HVBs 3 and 5. There is more CO2 in the gas mix. All else unchanged.
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Channels with oscillations
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Looking for the oscillation start times - searched for 3 consecutive dips below adc value of 20, starting at sample 0. The first dip time is recorded for each channel.
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Dip time in 1 channel vs every other dip time in the same event
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Changed search start time to sample 90.
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Dip time in any one channel vs every other dip time in the same event
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Previous run, before preamps 3&5 were exchanged
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Dip time in any one channel vs every other dip time in the same event
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Switched off HV to CDC
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Run 32544 channels with oscillations
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Channel with "hit" <5 samples before oscillation in another channel
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Triggered on lower scint singles, switched off HV to upper scint
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Run 32553 channels with oscillations
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Channel with "hit" <5 samples before oscillation in another channel
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Triggered on upper scint singles, switched off HV to lower scint
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Run 32554 channels with oscillations
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Channel with "hit" <5 samples before oscillation in another channel
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Triggered on scints in coinc, switched preamps 1 and 2
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Run 32560 channels with oscillations
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Channel with "hit" <5 samples before oscillation in another channel
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Moved both scints across to the far lab wall
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Run 32561 channels with oscillations
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Channel with "hit" <5 samples before oscillation in another channel
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Removed T to scope from scint signal cables, scints still by the far lab wall
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Run 32562 channels with oscillations
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Channel with "hit" <5 samples before oscillation in another channel
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Decreased scintillator HV to 1750V
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Run 32563 channels with oscillations
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Channel with "hit" <5 samples before oscillation in another channel
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Increased scintillator HV to 2100V
Swapped preamps 1 and 2
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Run 32570 channels with oscillations
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Channel with "hit" <5 samples before oscillation in another channel
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swapped data cables 1 and 2 - run 32575
swapped hvbs 1 and 2 (only hvb, not preamp or cable) - run 32581