ALICE Calibration Requirements
MUON OK January 07  
 
Par # Parameter Data format/size per channel Data size (Total) Bytes Update freq Source Confirmed  Run type / Trigger type # of required events/sampling rate Processing level: sub-event or event Results: FEE/Archive Accessible by offline Calib. Procedure in AliRoot use case #
      on FXS in OCDB reference                                                  
1 Pedestal corrections Buspatch, manuid, channelid, mean, sigma 2.80E+07 1.00E+07 no Run DAQ  yes pedestal / pulser 1000 events / run sub-event  FEE + DAQ FXS/OCDB Yes yes 1
2 Gain corrections Buspatch, manuid, channelid, a0, a1, a2 2.80E+08 1.25E+07 no Day DAQ   yes calibration / pulser 5 * 1000 events / run sub-event  DAQ FXS/OCDB Yes yes 1
3 FEE parameters from industry seria n°, channel, capa, gain   5.00E+06 no Once DCDB (XML files) yes - - - DCDB/OCDB Yes yes 1 (once)
? no
4 Dead map - Tracking Buspatch, manuid, channelid, status 0 0.00E+00 no Run Offline yes physics - - - Yes yes  Created offline on the fly from 1+2+10
5 GMS Tracking AliAlignObjMatrix 2.50E+04 2.50E+04 no Run DCS yes - - - DCS ArchiveDB/OCDB Yes yes 3
6 Aligment Tracking AliAlignObjMatrix 2.50E+04 2.50E+04 no few/Day Offline yes Field OFF + ON 10-100 Kevents event OCDB Yes yes produced offline (CAF)
7 Dead map - Trigger #RegionalBoard, #LocalBoard, #stripNumber, level ? 5.00E+03 no Run DAQ  yes calib and phys runs 100 calib events / run sub-event  DAQ FXS/OCDB Yes yes 1
8 Masks (Trigger) #RegionalBoard, #LocalBoard, #stripNumber, level 0 5.00E+03 no Run DAQ  yes calib and phys runs 100 calib events / run sub-event  DAQ FXS/OCDB Yes yes 1
9 Look-up-Table (Trigger) 32768 (15 adress bits) * 4 output bit word (2 bits for lpt and 2 bits for hpt) 0 4.00E+06 no Each change of physics conditions First runs Simulation then real data (DAQ) yes phys runs all events event DAQ FXS/OCDB Yes yes produced offline 
10 HV values AliDCSValue 0 150000 ; (minimum, variable) no Run DCS yes physics - event OCDB yes yes 3                              
3.16E+07 0.00E+00
DCS access - offline has access only to DCS archive DB, curently no access to configuration DB
DAQ - offline has access to raw data and DAQ logbook, but no acccess to LDC or GDC directly
OCDB - Calibration parameters are stored in the Offline Calibration DB. The data used to calculate these parameters, the reference data, can also be optionally archived for later access from offline.