July 2011 WHCAL Test Beam Analysis Update on Pedestals & Noise A few event displays

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July 2011 WHCAL Test Beam AnalysisJuly 2011 WHCAL Test Beam Analysis

Update on Pedestals & NoiseUpdate on Pedestals & NoiseA few event displaysA few event displays

Damien Prieur - W-HCAL analysis meeting

Damien Prieur - W-HCAL analysis meeting 2

Stability – average per run

calibration runs

Electron runs

Low stat runs

‘shift in pedestal for slot19 FE0’

Non uniform pedestals

Slide from last week Average/RMS per run -> bias depending number of pedestal blocks per run

Damien Prieur - W-HCAL analysis meeting 3

Stability – average per pedestal block

Average/RMS per pedestal block (500 events) Higher spread of <ADC-pedestal> but more relevant results

361471

361400

Damien Prieur - W-HCAL analysis meeting 4

Stability – single layer (3)

Damien Prieur - W-HCAL analysis meeting

Stability – run 361400

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<ADC –ped>

RMS

Damien Prieur - W-HCAL analysis meeting 6

Stability – run 361471

Damien Prieur - W-HCAL analysis meeting 7

Stability – layer 33

Energy sum run 361473- Full calorimeter

- Without layer 33

Damien Prieur - W-HCAL analysis meeting 8Event 6999

Event display – run 361473

Event 2634

Event 4734

Damien Prieur - W-HCAL analysis meeting 9

Pedestals are fine Some stability problems with layer 33 but no dramatic impact on physics

Stable noise Low nHits/cogZ events

Look like genuine particles…

Summary