CDC odd events

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Monster signals

50/50 Ar/CO2 2200V (rare)

Board G10, run 32135 evt 189
Board G11, run 32135 evt 189, ch13 is not connected to a straw
Board G12, run 32135 evt 189

50/50 Ar/CO2 2200V (rare, 2 in 2k triggers)

Board H17, run 32142 evt 1151, ch7 and ch13 are strawless
Board I18, run 32142 evt 1151
Board I19, run 32142 evt 1151
Board H17, run 32142 evt 1940, ch7 and ch13 are strawless
Board I18, run 32142 evt 1940
Board I19, run 32142 evt 1940

Noise

50/50 Ar/CO2 2100V (few % events)

Board D1, run 32128 evt 84
Board E1, run 32128 evt 84
Board E17, run 32128 evt 84, ch11 is not connected to a straw

50/50 Ar/CO2 2200V (few % events)

Board G10, run 32141 evt 42
Board G11, run 32141 evt 42
Board G12, run 32141 evt 42

Big bad noisy run (32099) 50/50 Ar/CO2 2100V

Board A8, run 32099 evt 425
Board B1, run 32099 evt 425
Board B9, run 32099 evt 425
Time (? event number) of noisebursts (all 72ch dipping below 0)
Threshold crossing times
Threshold and zero crossing times
Same straws, different day - ran overnight, no mass-noise oscillations occurred
Threshold crossing times from a later run

Possible clues from an earlier run

ch0:attenuated coincidence signal, ch1: attenuated discriminator signal from upper scint, ch2: atten discriminator signal from lower scint. Their shapes look a bit odd because of the flash's shaping.

NB apart from during the pulse itself, the logic signal level usually varies by less than +/- 1 adc unit

Run with a noise burst
Event data from logic signals and 21 of the 24 CDC channels
zoomed in around the noise
Clean run for comparison
Event data from logic signals and 21 of the 24 CDC channels
zoomed in


Another run with a noise burst
Event data from logic signals and 21 of the 24 CDC channels