CDC gain calibrations

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Older page is CDC_q_vs_n

Later runs 10347-11668 (calibration groups 1 (11347-11555) & 2 (11556-11668))

Pressure during runs 10366-11668. Circled runs selected for calibration.
Temperature during runs 10366-11668
Downstream thermocouples
Amplitude fits for straws 501-510, using mean of D3 and D4 temps
Amplitude fits for straws 1101-1110
Hole locations of 501-510 (top) and 1101-1110
Amplitude fits for straws 501-510, using mean of D1 and D2 temps

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.
Pressure during runs 10331-10913. Circled runs selected for calibration.
Temperature during runs 10391-10913
run11059 amplitude
run10391 amplitude
run10518 amplitude
run10562 amplitude
run10564 amplitude
run10780 amplitude
run10837 amplitude
MIP MPV vs pressure
MIP MPV vs pressure/temperature
MIP MPV & pressure vs run number



Flying bracket incident runs 11059 -11312 (calibration group 4)


Pressure during runs 11059 -11312. Circled runs selected for calibration.
Temperature during runs 11059 -11312




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 2907-2926, 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 ]

run 10703 straw 20
run 10703 straw 22

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 to 11576 ([ https://logbooks.jlab.org/entry/3401572 logbook entry ])
Low-gain HVB group 3270-3277  "
Low-gain HVB group 3479-3486  "

Problem runs

11666 has super-low gain, not a production run