Difference between revisions of "CDC gain calibrations"

Revision as of 13:21, 24 June 2016

Early runs 10391-10913

• 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

Disconnected straws: 709, 2384, runs 10331 on.

Missing straws:

3150 disappears during 10456 to 10464 and does not return with the rest in 10491

straw 3151 runs 10331-11059

straw 2873 missing in 011059
straw 2964 missing in 011059
straw 3372 missing in 011059

Low gain straws:

straw 244  runs 10331-11059 
n= 2977  runs 10331-11059 
n= 3178  runs 10331-11059 
Low-gain HVB group 3064-3070  rocid==26 slot==15 chan 48+
Low-gain HVB group 3270-3277
Low-gain HVB group 3479-3486