Difference between revisions of "CDC gain calibrations"
From GlueXWiki
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no fit for straw 3372 | no fit for straw 3372 | ||
bad fit for straw 10 | bad fit for straw 10 | ||
− | bad fit for straw 30 (only 11621) | + | bad fit for straw 30 (only 11621, 11644, not 11623,25,26,45,48) |
bad fit for straw 244 (not 11621 or 11625) | bad fit for straw 244 (not 11621 or 11625) | ||
</pre> | </pre> |
Revision as of 15:06, 7 September 2016
Older page is CDC_q_vs_n
Contents
Later runs 10347-11668 (calibration groups 1 (11347-11555) & 2 (11556-11668))
Early runs 10391-10913 (calibration group 3)
- fadc thresholds were high and for runs with high atmospheric pressure the minimum ionizing peak in pulse amplitude was partly or mostly below threshold
- Chose straws 501-510 as these had high gain and their MIP was visible in most runs, found the scaling factor to match their MPV for the run of interest to run 11059, scaled the individual gains for run 11059 to give gains for the run of interest. Chose run 11059 as it was the next run after the thresholds had been adjusted.
Flying bracket incident runs 11059 -11312 (calibration group 4)
Missing straws
Disconnected straws: 709, 2384, runs 10331 on.
Other missing straws: straw 3150 runs 10455 on (last run was 11366) straw 3151 runs 10331 on straws 21-25, 62-67, 110-116, 164-169 (HVB A5) runs 10392-10399 straws 2392-2399 runs 10455-10464 (HVB I8 and another) straws 2575-2582 runs 10455-10464 straws 2760-2767 runs 10455-10464 straws 2957-2964 runs 10455-10464 straws 3157-3164 runs 10455-10464 straws 3366-3373 runs 10455-10464 straw 2384-2391 run 10518 (not approved, but interesting for the low pressure) straw 2567-2574 run 10518 straw 2751-2759 run 10518 straw 2950-2956 run 10518 straw 3149-3156 run 10518 straw 3358-3365 run 10518 one straw from row 23 missing in 10573 straw 2873 missing in 011059 on straw 2964 missing in 011059 on straw 3372 missing in 011059 on Flying bracket incident: runs 11078-11312 Missing straws: 1-4, 42-46, 83-89, 137-142, 191-196, 255-262, 322-329, 400-412, 479-494, 571-577, 579-586, 663-670 Run 11132 missing straws: as above plus 2927-2906, 3094-3124, 3302-3333, 3511-3522
Run 10703 - HV for board A5 was tripping on and off throughout the run. A5 includes straws 21-25. Presumably the HV was reduced so that it wouldn't trip? Check the logbook.
[ https://halldweb.jlab.org/work/halld2/data_monitoring/RunPeriod-2016-02/mon_ver03/Run010703/CDC_occupancy.png occupancy plot ]
Runs 11620-11626:
no fit for straw 3 no fit for straw 709 no fit for straw 2384 no fit for straw 2873 no fit for straw 2964 no fit for straw 3149 (run 11626 only) no fit for straw 3150 no fit for straw 3151 no fit for straw 3360 (runs 11625-6 only) no fit for straw 3372 bad fit for straw 10 bad fit for straw 30 (only 11621, 11644, not 11623,25,26,45,48) bad fit for straw 244 (not 11621 or 11625)
Low gain straws
straw 244 runs 10331 on straw 1391 runs 10391-11063 straw 2977 runs 10331-11063 straw 3178 runs 10331-11063 Low-gain HVB group 3064-3070 runs 10331 until after 11059 (will check) Low-gain HVB group 3270-3277 " Low-gain HVB group 3479-3486 "
Problem runs
11666 has super-low gain, not a production run