Difference between revisions of "PreAmp tests with premixed 90/10 Ar/CO2 - software threshold"
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|width="400pt"|[[Image:efficiency_with_threshold_1450V.jpg|thumb|none|400px|Tracking efficiency with software threshold, 1450V, 90/10 premix]] | |width="400pt"|[[Image:efficiency_with_threshold_1450V.jpg|thumb|none|400px|Tracking efficiency with software threshold, 1450V, 90/10 premix]] | ||
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| + | Max amplitude histogram for fADCthresholds 3, 4 | ||
| + | {| border="1" cellpadding="2" | ||
| + | |width="400pt"|[[Image:amp_thr3_1450V.jpg|thumb|none|400px|Max amplitude histogram, software threshold 3, 1450V, 90/10 premix]] | ||
| + | | border="1" cellpadding="2" | ||
| + | |width="400pt"|[[Image:amp_thr4_1450V.jpg|thumb|none|400px|Max amplitude histogram, software threshold 4, 1450V, 90/10 premix]] | ||
| + | |} | ||
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| + | Max amplitude histogram for fADCthresholds 2 | ||
| + | {| border="1" cellpadding="2" | ||
| + | |width="400pt"|[[Image:amp_thr2_1450V.jpg|thumb|none|400px|Max amplitude histogram, software threshold 2, 1450V, 90/10 premix]] | ||
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Revision as of 11:18, 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 histogram for fADCthresholds 3, 4
| border="1" cellpadding="2" |
Max amplitude histogram for fADCthresholds 2
1475V
Tracking efficiency as a function of fADCthreshold
1425V
Tracking efficiency as a function of fADCthreshold
