TOWER CALIBRATION A.D.2004

EEMC Tower Calibration 2004

Track to Tower matching (P04id production)

TTM maker

processed all muDST files from the catalog: production P04id
cuts summary:
- max CTB sum allowed 1000
- min hits/track required 5
- min track length required 20.00
- min track transverse momentum required 0.50
- min track pseudo-rapidity at origin required 0.70
- max track pseudo-rapidity at origin required 2.20
- tracks were matched at the following depths:
  1. z=270.29 "pres"
  2. z=279.54 "smd"
  3. z=306.06 "post"
- max track to tower center dist. 0.70 x tower half-width (phi)
- max track to tower center dist. 0.70 x tower half-width (eta)
- max # of tracks that hit a tower 1
MIP calibration [June 8,2004]
- ADC=ADC(raw)-ADC(ped) distributions for individual towers were fitted with a Landau distribution ADC [5.0,80.0]
- most probable value (MPV) of the fit was converted to a tower gain [chan/GeV]
- the actual tower gains follow quite well the desired gains
- here are the MIP calibration tables
electron calibration [June 8, 2004]

electron candidates were selected using StMuTrack::pidProbElectron()
energy deposit was calculated as ΔE = ADC/(4076/60.0)*cosh(eta)
a histogram of p/E for tracks with StMuTrack::pidProbElectron()>0.10 was made
a corresponding histogram of p/E for all matched tracks
the two histograms were normalized for p/E [3.0,10.0] and subtracted
the subtracted histogram was fitted with a Gaussian distribution
the results are below:

2.4 M events

MIP gains [Apr 22, 2004]
ADC spectra/Landau fit[Apr 22, 2004]
ADC spectra (CTBsum<100,CTBsum<500,no CTBsum cut) [Apr 22, 2004]
Phi vs Eta (CTBsum<500) [Apr 22, 2004]
Phi vs Eta (CTBsum<1000) [Apr 22, 2004]
Preliminary calibration tables [Apr 22, 2004]

1.2 M events

MIP gains [Apr 19, 2004]
ADC spectra [Apr 19, 2004]

EEmcTTMMaker Documentation

can be found here

EEmcTTDisplay

This is a primitive class that I wrote to aid debugging EEmcTTMMaker. It just displays pairs of towers and tracks that are matched in EEmcTTMMaker. Note that tracks are extrapolated from track origin (typically near vertex) to the EEMC.