 Run 32488 channels in use |
 max amp histo, threshold 5#sigma |
 drift time, threshold 5#sigma |
 drift time (zoomed in), threshold 5#sigma |
 resolution, threshold 5#sigma |
 drift time for all channels in each of 3 fadcs |
 drift time for all channels in each HVB |
 resolution, using different tzero for each fadc, threshold 5#sigma |
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 resolution, ch 101 (A4 ch 6) |
 Run 32495 channels in use |
 drift time, CF endplate, threshold 5#sigma |
 drift time, center, threshold 5#sigma |
 drift time, Al endplate, threshold 5#sigma |
Switched HVBs 3 and 5 (all electronics swapped at the chamber) - forgot to reset pedestals beforehand though :-( - they are too low for HVBs 3, 5
 drift time, Al endplate, threshold 5#sigma |
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drift time, CF endplate, threshold 5#sigma |
drift time, threshold 5#sigma |
 drift time, all hits belong to track |
 drift time, early hits reassigned to t0, all hits belong to track |
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 |
 Run 32488 events in ch 71 zoomed |
 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 |
 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 |
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 |
 Channels with hit < 10 samples before zero-crossing in another channel |
 Channels with tracked hit < 10 samples before zero-crossing in another channel |
 Run 32495 channels in use |
 Channels with hit < 10 samples before zero-crossing in another channel |
 Channels with tracked hit < 10 samples before zero-crossing in another channel. Red spot = hit in 69, zero xing in 67. |
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 |
 Channels with tracked hit < 10 samples before zero-crossing in another channel. |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
swapped data cables 1 and 2 - run 32575
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 Run 32575 channels with oscillations |
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 Channel with "hit" <5 samples before oscillation in another channel |
swapped hvbs 1 and 2 (only hvb, not preamp or cable) - run 32581
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 Run 32581 channels with oscillations |
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 Channel with "hit" <5 samples before oscillation in another channel |
moved big scints closer to the CDC - onto the table, lower scint has pmt at Al end, upper at CF end
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 Run 32582 channels with oscillations |
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 Channel with "hit" <5 samples before oscillation in another channel |
rotated scints on the table, upper scint has pmt at Al end, lower at CF end
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 Run 32584 channels with oscillations |
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 Channel with "hit" <5 samples before oscillation in another channel |
taped off channels 32-36, 42-46 contacts to transition board, these are ch 8-12, 18-22 on I8 (HVB2)
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 Run 32592 channels with oscillations |
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 Channel with "hit" <5 samples before oscillation in another channel |
taped off channels 24-26, 32-36, 42-46 contacts to transition board and also HV to I8, these are ch 0-2, 8-12, 18-22 on I8 (HVB2)
(only 1/7 data of other runs)
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 Run 32597 channels with oscillations |
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 Channel with "hit" <5 samples before oscillation in another channel |
taped off all contacts to transition board except ground
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 Run 32604 channels with oscillations |
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 Channel with "hit" <5 samples before oscillation in another channel |
taped off all contacts to transition board including ground (still grounded through standoff)
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 Run 32615 channels with oscillations |
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 Channel with "hit" <5 samples before oscillation in another channel |
untaped the HV contact
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 Run 32620 channels with oscillations |
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 Channel with "hit" <5 samples before oscillation in another channel |
untaped all contacts except for HV
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 Run 32625 channels with oscillations |
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 Channel with "hit" <5 samples before oscillation in another channel |
removed tape from HV. Wrapped Al foil around reachable hookup wires on I8 in outermost row of straws
These are BB 53-58, AA53, AA55 : HVB channels 4,8,12,14,16,18,22,23 = 28,32,36,38,40,42,46,47
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 Run 32626 channels with oscillations |
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 Channel with "hit" <5 samples before oscillation in another channel |
