Difference between revisions of "CDC 216 channels"

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{| border="0" cellpadding="2"  
|[[Image:cdc_run32488cheese.png|thumb|x350px|Run 32488 channels in use]]
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|[[Image:cdc_run32488cheese.png|thumb|x250px|Run 32488 channels in use]]
|[[Image:cdc_run32488_closehitch_zch.png|thumb|x350px|Channels with hit < 10 samples before zero-crossing in another channel]]
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|[[Image:cdc_run32488_closehitch_zch.png|thumb|x250px|Channels with hit < 10 samples before zero-crossing in another channel]]
|[[Image:cdc_run32488_trackedclosehitch_zch.png|thumb|x350px|Channels with tracked hit < 10 samples before zero-crossing in another channel]]
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|[[Image:cdc_run32488_trackedclosehitch_zch.png|thumb|x250px|Channels with tracked hit < 10 samples before zero-crossing in another channel]]
 
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Revision as of 15:09, 19 September 2013

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
resolution, all straws
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

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

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)
First zero-crossing time
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
As left, zoomed in
Amplitude of hit channels where hit precedes zero-crossing in another channel

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