Difference between revisions of "PreAmp tests with premixed 90/10 Ar/CO2 - software threshold"
(→1450V) |
(→1475V) |
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+ | Max amplitude histograms for fADCthresholds 3, 4 | ||
+ | {| border="1" cellpadding="2" | ||
+ | |width="400pt"|[[Image:amp_thr3_1475V.jpg|thumb|none|400px|Max amplitude histogram, software threshold 3, 1475V, 90/10 premix]] | ||
+ | |width="400pt"|[[Image:amp_thr4_1475V.jpg|thumb|none|400px|Max amplitude histogram, software threshold 4, 1475V, 90/10 premix]] | ||
+ | |} | ||
====1425V==== | ====1425V==== |
Revision as of 11:23, 19 July 2010
We started at 1450V for premixed 90/10 Ar/CO2 (as that was the optimum HV determined previously) and varied the software acceptance threshold, then repeated for 1475V and 1425V.
In the analysis software, events are required to have a minimum amplitude of (pedestal_mean) + (fADCthreshold)*pedestal_sigma. Tracking efficiency is calculated as (number of events containing valid tracks)/(number of cosmic triggers from the scintillators above and below the prototype).
1450V
Tracking efficiency as a function of fADCthreshold
Max amplitude histograms for fADCthresholds 3, 4
Max amplitude histogram for fADCthreshold 2
1475V
Tracking efficiency as a function of fADCthreshold
Max amplitude histograms for fADCthresholds 3, 4
1425V
Tracking efficiency as a function of fADCthreshold
Max amplitude histograms for fADCthresholds 3, 4