Final calibration of Towers
for 2005 run CuCu data
using MIPS with 00xx00 signature in SMD


    Goal: determine absolute tower gains from fit of Gauss+Landau to 'd'-spectra and subtraction of pedestal residuum ('a'-spectra)

    Formula: gain(ch/GeV) = gain=2.89*TanH(eta)*(MIP-Ped)
    err^2= errMip^2 + errPed^2 + 0.3^2, last 0.3 accounts for peds systematic error

  1. INPUT: 'a' & 'd'-spectra from iteration 2
  2. 720 tower spectra , raw Landau fit results

    Example of a healthy MIP spectrum. Red dashed line marks the goal gain.

    Missing post shower skews the shape (the same eta bin).

    Low HV does not disturb the shape (other eta bin)

  3. Summary & remedy for failed channels
    1. masked(broken) towers (06TA03, 07TC05, 01TC06) - no gain in DB
    2. 3 towers with stuck low bits ( 04TB07, 06TA07 , 08TB07)- use slopes matched to neighbours at the same eta, will be more accurate
    3. towers with broken post shower (07TD03, 08TE05, 08TD07, 08TD09 , 01TD12, 03TE12) - MIP spectrum very distorted, use slopes as above
    4. remining hig/low gain towers were found already based on slopes and HV was corrected (by Julie) prior to pp200 run.
      Except 01TA04 . The only hit is we change HV for 01TA05, which looks OK in MIP analysis. So a typo somewhere?

    5. For pp200+ calibrations a second calibration set will be loaded to DB. Slopes will be used for ~20 towers the HV was changed.

  4. Final absolute tower gains for CuCu. , table w/ CuCu ETOW gains
    Blue bars mark the goal , i.e. ADC=4096 @ 60 GeV Et, dashed blue +/- 10% range. There is 60 towers per eta bin, advancing from 1TA --> 12TE.

    Script used to fit MIP: fitTower.C , plTwCal.C;
    To fit slopes & replace gains fitSlope5.C , fixGainUsingSlope.tclfitSlope5.C ,