ALICE Calibration Requirements

PMD OK July 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

Gain

Int,Int,Int,Int, Float

5.00E+06

2.00E+08

year

DAQ

yes

physics run

1.00E+06

sub event

DAQ FES/OCDB

Yes

Yes

1

Procedure in AliRoot

2

Pedestal

Int,Int,Int,Int,Float,Float

6.00E+06

per Run

DAQ

yes

pedesta Run

1.00E+03

sub event

OCDB

yes

No

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.