08) SMD-E gain equalization , ver 1.1

Under:

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

Fig 1 Example of 2 eta slices

 


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

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


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


Fig 4 The same predicted gain correction vs. stripID.