How to store calibration coefficients What kind of

How to store calibration coefficients? What kind of coefficients/calibrations? On what level to apply them? What kind of storage? UB Calibration Meeting FNAL - 24/4/2000 1

Electronics calibration • gain calibration/pedestals • 1 set of values per channel – electronics related • updated 2 -3 times a week Oracle Database: applied in ADC/Ge. V conversion in the reconstruction • development of extraction tools UB Calibration Meeting FNAL - 24/4/2000 2

Software Structure? packages to determine calibration coefficient + validation store coefficients: Oracle database? Tables in cvs? Retrieve coefficients for - reco (intercalibration) - ntuple-maker - dump into tables UB Calibration Meeting FNAL - 24/4/2000 3

-intercalibration • 1 coefficient/unit • 1 unit: – One or more cells – Evolves with statistics • First studies on ntuple-level • on reco-level before cluster/jet reconstruction? UB Calibration Meeting FNAL - 24/4/2000 4

em-absolute scale • Various processes (Z, , , J/ ) coefficients per process + global fit • 2 coefficients: offset/slope • Coefficients apply to objects • 1 unit: / - region not associated to a list of cells? • applied to ntuple-maker? UB Calibration Meeting FNAL - 24/4/2000 5

Jet Energy Scale • Various level of coefficients – – Coefficients depending on jet-algoritms Intercalibration of cryostats Intercalibration / - region Scale w. r. t photon • Applied to ntuple maker? • CAFIX++? – more general (em+had) package to extract and apply calibration coeffcients? – Interfaced to Oracle? – Other means to store values? UB Calibration Meeting FNAL - 24/4/2000 6

Possible database structure process: intercalibration – global, W, QCD, min-bais em-scale – global, Z, , , J/ jet-scale Version number Valid run-range Dataset used Mapping: unit-cell correspondance / - regions Coefficients p/region UB Calibration Meeting FNAL - 24/4/2000 7