08) SMD-E gain equalization , ver 1.1

Goal : predict BSMD-E relative gain corrections for every eta bin 

Method : find average slope per eta slice, fit gauss, determine average slope : avrSlope(iEta)

Gain correction formula is used only for extreme deviations:  

• gainCorr_i = slope_i/avrSlope(iEta),  i =1,..,18,000
• if( fabs(1-gainCorr)<0.15) gainCor=1.0  // do not correct

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Fig 1 Example of 2 eta slices

 

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Fig 2 TOP: Slope distribution vs. eta-bin, average marked by crosses

BOTTOM: predicted gain correction. Correction=1 for strips w/ undetermined gains. 

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Fig 3 Predicted gain correction. Correction=1 for ~14K of 18K strips.

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Fig 4 The same predicted gain correction vs. stripID.