L1Cal Pedestal Studies Sabine Lammers Philippe Laurens 26-Sep-2006.
Dec 21, 2015
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- Slide 1
- L1Cal Pedestal Studies Sabine Lammers Philippe Laurens 26-Sep-2006
- Slide 2
- Test Conditions on 26-Sep-2006 This data was collected starting around 18:30, while the detector was closing. The closing process normally takes ~1 hour, but took closer to 4, and we think they started shortly after 6pm. The conditions for these tests thus probably started closer to (C) with the iron in motion. (A) CAL powered but not read out; PDT A-Layer off (powered down); SMT off; CFT on; iron open (B) CAL powered but not read out; PDT A-layer on; SMT off; CFT on; iron open (C) CAL powered but not read out; PDT A-layer on; SMT on but not read out; CFT on; iron open (D) CAL powered but not read out; PDT A-layer on; SMT on but not read out; CFT on; iron closed
- Slide 3
- Example: HD_TT(+9,19) Fairly quiet Iron Closing Raw ADC oversampled data: Average and Standard Deviation of 4x159=636 independent 1,000 point histograms
- Slide 4
- Iron Closing Raw ADC oversampled data: Average and Standard Deviation of the samples used for the 36 Live Crossings Example: HD_TT(+9,19) Fairly quiet
- Slide 5
- Example: HD_TT(+9,22) High 132ns synchronous noise Low Turn-wise synchronous noise Iron Closing
- Slide 6
- Example: HD_TT(+9,22) High 132ns synchronous noise Low Turn-wise synchronous noise
- Slide 7
- Iron Closing Example: HD_TT(+9,9) High 132ns synchronous noise High Turn-wise synchronous noise
- Slide 8
- Iron Closing Example: HD_TT(+9,9) High 132ns synchronous noise High Turn-wise synchronous noise
- Slide 9
- Random Noise does not change noticably while Iron is Closing Iron Closing
- Slide 10
- Pedestal Fluctuation wrt. Live X (i.e. turn-wise synchronous noise) increases while Iron is Closing Iron Closing
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