Difference between revisions of "CDC 216 channels"
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|[[Image:cdc_run_32531_dt216.png|thumb|x250px|Run 32531 drift times]] | |[[Image:cdc_run_32531_dt216.png|thumb|x250px|Run 32531 drift times]] | ||
|[[Image:cdc_run_32532_dt216.png|thumb|x250px|Run 32532 drift times]] | |[[Image:cdc_run_32532_dt216.png|thumb|x250px|Run 32532 drift times]] | ||
+ | |} | ||
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+ | <hr/> | ||
+ | This run started after the CO2 had run out - more Ar reaching boards 1 and 2 (at the top of the chamber) and then 5 | ||
+ | {| border="0" cellpadding="2" | ||
+ | |[[Image:cdc_run_32535_dt216.png|thumb|x250px|Run 32535 drift times]] | ||
|} | |} |
Revision as of 16:27, 8 October 2013
Switched HVBs 3 and 5 (all electronics swapped at the chamber)
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)
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.
Switched HVBs 3 and 5 (first is at top, increase top to bottom, L to R)
File:Cdc run 32531 dt216.png Run 32531 drift times |
File:Cdc run 32532 dt216.png Run 32532 drift times |
This run started after the CO2 had run out - more Ar reaching boards 1 and 2 (at the top of the chamber) and then 5