1. Peter Kodyš, SCT Week Valencia, Juni 13, 2002 peter.kodys@mff.cuni.cz1 http://www-ucjf.troja.mff.cuni.cz/~kodys/Work/TBMay2002/TBMay2002.html Charles University Prague Peter Kodyš, Zdeňka Broklová, Zdeněk Doležal, Pavel Řezníček Institute of Particle and Nuclear Physics Charles University Prague Preliminary Analysis And Common Mode Investigation TestBeam May 2002

2. Peter Kodyš, SCT Week Valencia, Juni 13, 2002 peter.kodys@mff.cuni.cz2 http://www-ucjf.troja.mff.cuni.cz/~kodys/Work/TBMay2002/TBMay2002.html Charles University Prague Common Noise Effects In Testbeam? Special Run 4484, threshold 0.3fC, Occupancy 40% 7/6/2002 chips: 25-80% Problem: Incorrect stream identification observed Readout problem?

3. Peter Kodyš, SCT Week Valencia, Juni 13, 2002 peter.kodys@mff.cuni.cz3 http://www-ucjf.troja.mff.cuni.cz/~kodys/Work/TBMay2002/TBMay2002.html Charles University Prague TestBeam ReadOut Analysis Plot Hit cumulating Empty events Interstream transfer In practice: hits belonging to one stream were found in another stream instead Observed only in extremely high occupancy

4. Peter Kodyš, SCT Week Valencia, Juni 13, 2002 peter.kodys@mff.cuni.cz4 http://www-ucjf.troja.mff.cuni.cz/~kodys/Work/TBMay2002/TBMay2002.html Charles University Prague Basic Conditions 1 For Analysis Scan “I” Run 4382-4399, 3/6/2002 Run contains 20kEvents, 13kEvt for noise analysis, 2.4kEvt for eff Edge Off Bias 150 V (unirradiated) 350 V (irradiated) Analysis for each chip, 9 interstrip positions (Eta study) Threshold was corrected by chips cap correction of Qcal Focus to modules (representative sample for quick analysis): Irradiated k5_308, k5_305 Unirradiated k5_302, 0046 (barrel) Bad channels: k5_308: 14, k5_305:13+27, k5_302: 1 0046: 1

5. Peter Kodyš, SCT Week Valencia, Juni 13, 2002 peter.kodys@mff.cuni.cz5 http://www-ucjf.troja.mff.cuni.cz/~kodys/Work/TBMay2002/TBMay2002.html Charles University Prague Efficiency & Cluster Size Exclude events with more tracks Exclude events with high track uncertainty Exclude events with Bad Channel in track region Exclude events with more hits in the same place (readout bug) Exclude events with no hit in any plane for Thr < 1.3 (readout bug) Exclude events with TimeBin out of possible value (readout bug) Exclude events with no anchor0 & anchor1 (plane 0 & 1) 5ns TDC cut window –for each run, each stream Noise Occupancy Only hits in first TimeBin Only hits out of track region + 1mm Basic Conditions 2 For Analysis

6. Peter Kodyš, SCT Week Valencia, Juni 13, 2002 peter.kodys@mff.cuni.cz6 http://www-ucjf.troja.mff.cuni.cz/~kodys/Work/TBMay2002/TBMay2002.html Charles University Prague Efficiency vs Qth - Scurves

7. Peter Kodyš, SCT Week Valencia, Juni 13, 2002 peter.kodys@mff.cuni.cz7 http://www-ucjf.troja.mff.cuni.cz/~kodys/Work/TBMay2002/TBMay2002.html Charles University Prague Cluster Size vs Qth

8. Peter Kodyš, SCT Week Valencia, Juni 13, 2002 peter.kodys@mff.cuni.cz8 http://www-ucjf.troja.mff.cuni.cz/~kodys/Work/TBMay2002/TBMay2002.html Charles University Prague Noise Occupancy vs Qth

9. Peter Kodyš, SCT Week Valencia, Juni 13, 2002 peter.kodys@mff.cuni.cz9 http://www-ucjf.troja.mff.cuni.cz/~kodys/Work/TBMay2002/TBMay2002.html Charles University Prague Summary ModuleEff @ 1fC Eff @ 1fC best chip Threshold @ 99% Eff Median Point [fC] Noise Occup @ 1fC Noise Occ @ 1fC best chip Threshold @ 5 e-4 Noise Occ K5_302 S0.9951.01.73.35.9 e-54.1 e-50.8 K5_302 S1.9981.01.653.48.3 e-55.9 e-50.9 K5_308 S0 *.9901.01.52.33.2 e-39.1 e-41.2 K5_308 S1 *.9931.01.252.95.7 e-32.3 e-31.18 K5_305 S0 *.9801.00.952.59.9 e-33.7 e-31.19 K5_305 S1 *.9911.0 2.58.2 e-32.4 e-31.2 0046 S0.9991.01.753.47.1 e-54.5 e-5- 0046 S1.9951.01.73.56.7 e-55.0 e-50.75 * irradiated

10. Peter Kodyš, SCT Week Valencia, Juni 13, 2002 peter.kodys@mff.cuni.cz10 http://www-ucjf.troja.mff.cuni.cz/~kodys/Work/TBMay2002/TBMay2002.html Charles University Prague Preliminary Conclusions No real common noise effects observed for threshold range used Readout problems observed for very high occupancy (lost or mixed hits between streams) (any other experience with readout of 11 modules in one system?) Preliminary results from second independent analysis agree with Valencia analysis Current information about status of Prague offline & analysis is in: http://www-ucjf.troja.mff.cuni.cz/~kodys/Work/TBMay2002/TBMay2002.html