CFT Offline Calibration

Basic Assumptions

                We assume that for offline calibration CFT detector needs pedestals, gains and efficiencies for each channel. Under efficiency we understand relative light output which depend on fiber (both scintillating and clear) characteristics, quality of connectors, physical and attenuation length of wave-guides. At the simplest level it can be just information on if the channel is dead or fiber is broken – efficiency equals 0.Calibration parameters depend on time and possibly on luminosity, if different hardware parameters ( bias voltage) will be used for different luminosity (background) ranges.

We also assume that calibration of the whole CFT at once in a single run could be impossible or unnecessary so at the database level we have to deal with subsets of calibration parameters.

Current design 

See entity relationship( also in pdf )and table definition(pdf)diagrams.