ALICE Calibration Requirements |
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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 # |
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on FES |
in OCDB |
reference |
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1 |
Thresholds |
1 float |
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2.60E+06 |
0 |
week ? |
DCDB ? |
yes |
no |
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Yes |
No |
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2 |
Pedestals |
1 float |
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2.60E+06 |
0 |
day |
DAQ |
yes |
special calibration run |
1000 events |
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FEE/OCDB |
Yes? |
No |
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3 |
Noise levels |
1 float |
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2.60E+06 |
0 |
day |
DAQ |
yes |
special calibration run |
1000 events |
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FEE/OCDB |
Yes |
No |
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4 |
Gains |
1 float |
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2.60E+06 |
0 |
week ? |
DCDB ? |
yes |
special calibration run ? |
1000 events |
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OCDB |
Yes |
No |
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5 |
Maps of dead/bad strips |
1 int |
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1.82E+05 |
0 |
week ? |
DCDB |
yes |
no? |
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OCDB |
Yes |
No |
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1.06E+07 |
0.00E+00 |
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DCS access - offline has access
only to DCS archive DB, curently no access to configuration DB |
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DAQ - offline has access to raw
data and DAQ logbook, but no acccess to LDC or GDC directly |
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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. |
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