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Pulser run study (12/11/01)

This study analyzes ramp runs with an online calibration program to compare the DataGain in x1 and x8 runs. The study examines various issues such as random channels, saturation, swapping of channels, and noise variations with DAC values.

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Pulser run study (12/11/01)

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  1. Pulser run study(12/11/01) • Ramp runs analyzed with online calibration program • 132111 (x8 -2 ticks) • 132108 (x1 -2 ticks) • Problems in the dataGain x8 data in gain x1 run and vice versa • “random channels” • 4158 x1  x8 saturates (true x8?) • 40540 x1  x8 don’t saturate • 1274 x8  x1 ~1900 for DAC= 50k (true x1?) • Sequences (4, 12 or 24) • 35664-35687 x1  x8 no sat • 42600-42623 x8  x1 ~0 • Swapped x1  x8 (1, 4, 12) • 9700 • 31596-31607 • 36100-36103 • Do not occur for the whole run • 36100-36103 swapping starts at 4th DAC value R. Zitoun, Stony Brook and LAPP (http://www-d0.fnal.gov/~zitoun)

  2. Gain comparison ADC saturation DAC/1000 R. Zitoun, Stony Brook and LAPP (http://www-d0.fnal.gov/~zitoun)

  3. Gain comparison • Systematic difference between gain 1 and gain 8 not always in the same direction R. Zitoun, Stony Brook and LAPP (http://www-d0.fnal.gov/~zitoun)

  4. Gain comparison DAC=5000 - DAC=0 DAC=0 Gain x1 Gain x1 Gain x8 DAC=10000 - DAC=0 Gain x1 Gain x8 Gain x8 • Stripes do not seem to be linked with preamp type • Grain of salt: first look seems to imply pulser boxes R. Zitoun, Stony Brook and LAPP (http://www-d0.fnal.gov/~zitoun)

  5. Noise • Noise as a function of DAC valueAs a function ot preAmp type (1-14) + N/A + ICD 20- C A B Ha N/A ICD No variation with DAC (before saturation) R. Zitoun, Stony Brook and LAPP (http://www-d0.fnal.gov/~zitoun)

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