Difference between revisions of "CDC 216 channels"
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|[[Image:cdc_run_32488_dt_tracked.png|thumb|x250px|drift time, all hits belong to track]] | |[[Image:cdc_run_32488_dt_tracked.png|thumb|x250px|drift time, all hits belong to track]] | ||
|[[Image:cdc_run_32488_tfix0_dt_tracked.png|thumb|x250px|drift time, early hits reassigned to t0, all hits belong to track]] | |[[Image:cdc_run_32488_tfix0_dt_tracked.png|thumb|x250px|drift time, early hits reassigned to t0, all hits belong to track]] | ||
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+ | Switched HVBs 3 and 5 (all electronics swapped at the chamber) | ||
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+ | {| border="0" cellpadding="2" | ||
+ | |[[Image:cdc_run_32510_dt.png|thumb|x250px|drift time, Al endplate, threshold 5#sigma]] | ||
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Revision as of 10:47, 25 September 2013
Switched HVBs 3 and 5 (all electronics swapped at the chamber)
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)
Compare resolution with channels 68 (on noisy board E4) and 148 (similar position on different board E14)
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.