ALICE Calibration Requirements |
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V0 OK July 06 |
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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 |
gains |
32 bits (TBC) |
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512[1] |
0 |
Run |
DAQ (on line data) * |
yes |
physics data * |
at least 2000 L2 (TBC) |
event and sub-event |
DAQ FES / OCDB |
yes |
fall 2006 |
6 |
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2 |
pedestal means |
32 bits (TBC) |
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512 |
0 |
Run |
DAQ (on line data) * |
yes |
physics data * |
at least 1000 L2 (TBC) |
event and sub-event |
FEE and DAQ FES /
OCDB |
yes |
fall 2006 |
6 |
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3 |
pedestal sigmas |
32 bits (TBC) |
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512 |
0 |
Run |
DAQ (on line data) * |
yes |
physics data * |
at least 1000 L2 (TBC) |
event and sub-event |
FEE and DAQ FES /
OCDB |
yes |
fall 2006 |
6 |
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4 |
time gains |
32 bits (TBC) |
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256[2] |
0 |
Run |
DAQ (on line data) * |
yes |
physics data * |
at least 10000 L2 (TBC) |
event |
DAQ FES / OCDB |
yes |
Unknown |
1 |
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5 |
time offsets |
32 bits (TBC) |
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256 |
0 |
Run |
DAQ (on line data) * |
yes |
physics data * |
at least 10000 L2 (TBC) |
event |
possibly FEE and DAQ
FES / OCDB |
yes |
Unknown |
6 |
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2048 |
0 |
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* dedicated runs will be
used for an initial calibration |
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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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