Difference between revisions of "PreAmp tests with premixed 90/10 Ar/CO2 - software threshold"
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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. | 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. | ||
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| − | |width=" | + | |width="400pt"|[[Image:efficiency_with_threshold_1450V.jpg|thumb|none|400px|Tracking efficiency with software threshold, 1450V, 90/10 premix]] |
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| − | |width=" | + | |width="400pt"|[[Image:efficiency_with_threshold_1475V.jpg|thumb|none|400px|Tracking efficiency with software threshold, 1475V, 90/10 premix]] |
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| − | |width=" | + | |width="400pt"|[[Image:efficiency_with_threshold_1425V.jpg|thumb|none|400px|Tracking efficiency with software threshold, 1425V, 90/10 premix]] |
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Revision as of 10:57, 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
1475V
Tracking efficiency as a function of fADCthreshold
1425V
Tracking efficiency as a function of fADCthreshold
