ALICE Calibration Requirements  
 
 
T0 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 Total delay for each channel (laser) Array  (Float[3]) - 3.00E+02 no Run DAQ yes laser 1000 sub-event OCDB Yes in progress / to be finished by the end of 2006  1
2 Total delay for each channel (beam) Array  (Float[3]) - 3.00E+02 no Run DAQ yes physics runs 1000pp sub-event OCDB Yes in progress / to be finished by the end of 2006  1
3 PMT amplitude (laser) Array  (Float[3]) - 3.00E+02 no Run DAQ yes laser 1000 sub-event OCDB Yes in progress / to be finished by the end of 2006  1
4 PMT amplitude (beam) Array  (Float[3]) - 3.00E+02 no Run DAQ yes physics run 1000pp sub-event OCDB Yes in progress / to be finished by the end of 2006  1
5 Slewing correction for CFD (time walk) with LED TGraph(~60double)   6.00E+03 no Run DAQ yes calibration/laser 5000 sub-event OCDB/Preprocessor Yes in progress / to be finished by the end of 2006  1
6 Slewing correction for CFD (time walk) with QTC TGraph(~60double)   6.00E+03 no Run DAQ yes calibration/laser 5000 sub-event OCDB/Preprocessor yes in progress / to be finished by the end of 2006  1
7 Delay per each VDL channel Array of ints (Long64[24])   no 200 once before 1st run autonomous system measurements yes 1/year no no Preprocessor yes March 2007 produced offline
8  Delay in each PMT vs HV TGraph (~60double) - no 3.00E+02 once before 1st run autonomous system measurements yes 1/year no - Preprocessor Yes March 2007 produced offline
9 Signal cable delay for each PMT Array of ints (Long64[24]) - no 4.00E+02 once before 1st run autonomous system measurements yes 1/year no - Preprocessor Yes March 2007 produced offline
10 Look Up Table Array Of Ints (Int[111][4])   2.00E+03   if changed produced offline yes physics run all events event Preprocessor   end of 2006 produced offline
11 HV 1 short Int   2.00E+00   Run DCS Archive DB yes physics run run   Preprocessor Yes February 2007 4
12 Temperature (Env.) 3 floats (2-par fit+max excursion)   12   Run DCS Archive DB Yes physics run run event Preprocessor Yes February 2007 4 - 4 10 Temperature (Env.) 3 floats (2-par fit+max excursion)   12   Run DCS Archive DB Yes - minute - DCS ArchiveDB/OCDB Yes - 4 10 Temperature (Env.) 3 floats (2-par fit+max excursion)   12   Run DCS Archive DB Yes - minute - DCS ArchiveDB/OCDB Yes - 4 10 Temperature (Env.) 3 floats (2-par fit+max excursion)   12   Run DCS Archive DB Yes - minute - DCS ArchiveDB/OCDB Yes - 4 10 Temperature (Env.) 3 floats (2-par fit+max excursion)   12   Run DCS Archive DB Yes - minute - DCS ArchiveDB/OCDB Yes - 4 10 Temperature (Env.) 3 floats (2-par fit+max excursion)   12   Run DCS Archive DB Yes - minute - DCS ArchiveDB/OCDB Yes - 4 10 Temperature (Env.) 3 floats (2-par fit+max excursion)   12   Run DCS Archive DB Yes - minute - DCS ArchiveDB/OCDB Yes - 4 10 Temperature (Env.) 3 floats (2-par fit+max excursion)
13 Magetic field (B) 1 float   4   Run DCS Archive DB yes physics runs run run Preprocessor Yes February 2007 4                                                                                                                                                          
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.