ALICE Calibration Requirements
EMCAL OK October 06
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 FES in OCDB reference                                          
1  pedestal for low gain TH1I (872 bytes)     1.40E+04 run HLT or DAQ/LDC not special pedestal run or physics run 10000 events sub-event DAQ or HLT FES/OCDB yes no 1, 2, or 5
2 pedestal for high gain TH1I (872 bytes)     1.40E+04 run HLT or DAQ/LDC not special pedestal run or physics run 10000 events sub-event DAQ or HLT FES/OCDB yes no 1, 2, or 5  
3 pedestal sigma for low gain 1 float     1.11E+05 run HLT or DAQ/LDC not special pedestal run or physics run 10000 events sub-event OCDB yes no 1 or 2  
4 pedestal sigma for high gain 1 float     1.11E+05 run HLT or DAQ/LDC not special pedestal run or physics run 10000 events sub-event OCDB yes no 1 or 2  
5 energy/ADC channel for low gain from physics 1 float   1.11E+05 1.11E+05 run HLT or DAQ/LDC not physics run 1e+6 pp events sub-event DAQ or HLT FES/OCDB yes no 1 or 2  
6 energy/ADC channel for high gain from physics 1 float   1.11E+05 1.11E+05 run HLT or DAQ/LDC not physics run 1e+6 pp events sub-event DAQ or HLT FES/OCDB yes no 1 or 2
7 energy/ADC channel for low gain from LED 1 float   1.11E+05 1.11E+05 run, maybe more often HLT or DAQ/LDC not special LED run 10000 events sub-event DAQ or HLT FES/OCDB yes no 1 or 2
8 energy/ADC channel for high gain from LED 1 float   1.11E+05 1.11E+05 run, maybe more often HLT or DAQ/LDC not special LED run 10000 events sub-event DAQ or HLT FES/OCDB yes no 1 or 2  
9 time walk coefficient 1 for low gain 1 float   1.11E+05 1.11E+05 year LDC? not calibration run during long beam off periods 10000 events sub-event DAQ or HLT FES/OCDB yes no 1 or 2  
10 time walk coefficient 2 for low gain 1 float   1.11E+05 1.11E+05 year LDC? not calibration run during long beam off periods 10000 events sub-event DAQ or HLT FES/OCDB yes no 1 or 2  
11 time walk coefficient 3 for low gain 1 float   1.11E+05 1.11E+05 year LDC? not calibration run during long beam off periods 10000 events sub-event DAQ or HLT FES/OCDB yes no 1 or 2  
12 time walk coefficient 1 for high gain 1 float   1.11E+05 1.11E+05 year LDC? not calibration run during long beam off periods 10000 events sub-event DAQ or HLT FES/OCDB yes no 1 or 2  
13 time walk coefficient 2 for high gain 1 float   1.11E+05 1.11E+05 year LDC? not calibration run during long beam off periods 10000 events sub-event DAQ or HLT FES/OCDB yes no 1 or 2  
14 time walk coefficient 3 for high gain 1 float   1.11E+05 1.11E+05 year LDC? not calibration run during long beam off periods 10000 events sub-event DAQ or HLT FES/OCDB yes no 1 or 2  
15 dead/hot channel map 1 integer   5.60E+04 5.60E+04 run HLT or DAQ/LDC not physics run, LED run 10000 events sub-event HLT FES/OCDB yes no 1 or 2  
16 high voltages for APD 1 float   1.11E+07 1.11E+07 daily DCS not always - - DCS Archive DB/OCDB yes no 4  
17 Supermodule temperatures -   1.00E+03 1.00E+03 a few minutes DCS not always - - DCS Archive DB/OCDB yes no 4  
Total sizer per run     1.23E+07 1.25E+07          
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.
Remarks:
1) Source of EMCAL pedestal and zero-suppression is under discussion.
2) EMCAL HV values for each APD are manually inserted via DCS, not known where to find them back.
3) LV is under discussion.
4) Calibration procedures for EMCAL calibration are available as macros using the full aliroot framework, need to be implemented as TTasks. To be done in Aug.2006
5) Number of coefficients for obtaining peak ADC value is under discussion.
6) There will be a number of temperature sensors on Supermodules.  The number and location is under discussion.