Energy asymmetry in beam on collimator events

Runs:

beam 1
61642, 62063

beam 2
62068

Here are used 62063 and 62068.

• Normalized energy in HCAL (w/o HO) as a function of eta:
  

Total energy in HCAL(w/o HO) is normalized to 1. Beam 2 is mirrored in eta for this comparison.
All the splash events are used.Average over the events is used and the error bars are from the RMS of that distribution.

• Ratio of beam1/beam2 as a function of eta (with mirrored ieta for beam 2):
  

• ratio zoomed:
  

• HO beam 1 and beam 2(reverced ieta):
  Comment: phi 15 has smaller tile size - smaller signal, related to the flux.
  

• HO beam1/beam2 ratio: just to check that there is no "mysterious" change in the flux around eta +-1 ...
  

ToDo list:

• Check top/bottom only ratios - compare with muon measurement
• Check for systematic in the response: like HB phi -13 HPD degradation, etc.
• Check 2D flux seen in HCAL
• Check phi profile
• Difference in abs. energy between b1 and b2
• Amplitude in fC/ADC ?
• HO: ratio between the rings?

Energy Flux in eta-phi space
HB and HE

• HBHEbeam1:
  

• HBHEbeam2:
  

• HB : beam1,beam2:
  

• Ratios: b2r/b1 and b1/b2r (b2r - beam 2 mirrored in eta)
• Ratio b1/b2r

• beam1 over mirrored beam2: HB and HE:
  

• beam1 over mirrored beam2: HB:
  

• Ratio b2r/b1

• mirrored beam2 over beam1: HB and HE:
  

• mirrored beam2 over beam1: HB: