ALICE Calibration Requirements |
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MUON OK January 07 |
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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 FXS |
in OCDB |
reference |
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1 |
Pedestal corrections |
Buspatch,
manuid, channelid, mean, sigma |
2.80E+07 |
1.00E+07 |
no |
Run |
DAQ |
yes |
pedestal / pulser |
1000 events / run |
sub-event |
FEE + DAQ FXS/OCDB |
Yes |
yes |
1 |
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2 |
Gain corrections |
Buspatch,
manuid, channelid, a0, a1, a2 |
2.80E+08 |
1.25E+07 |
no |
Day |
DAQ |
yes |
calibration / pulser |
5 * 1000 events / run |
sub-event |
DAQ FXS/OCDB |
Yes |
yes |
1 |
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3 |
FEE parameters from
industry |
seria
n°, channel, capa, gain |
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5.00E+06 |
no |
Once |
DCDB (XML files) |
yes |
- |
- |
- |
DCDB/OCDB |
Yes |
yes |
1 (once) |
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? |
no |
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4 |
Dead map - Tracking |
Buspatch,
manuid, channelid, status |
0 |
0.00E+00 |
no |
Run |
Offline |
yes |
physics |
- |
- |
- |
Yes |
yes |
Created offline on the
fly from 1+2+10 |
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5 |
GMS Tracking |
AliAlignObjMatrix |
2.50E+04 |
2.50E+04 |
no |
Run |
DCS |
yes |
- |
- |
- |
DCS
ArchiveDB/OCDB |
Yes |
yes |
3 |
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6 |
Aligment
Tracking |
AliAlignObjMatrix |
2.50E+04 |
2.50E+04 |
no |
few/Day |
Offline |
yes |
Field OFF + ON |
10-100
Kevents |
event |
OCDB |
Yes |
yes |
produced offline (CAF) |
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7 |
Dead map - Trigger |
#RegionalBoard,
#LocalBoard, #stripNumber, level |
? |
5.00E+03 |
no |
Run |
DAQ |
yes |
calib and
phys runs |
100 calib
events / run |
sub-event |
DAQ FXS/OCDB |
Yes |
yes |
1 |
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8 |
Masks (Trigger) |
#RegionalBoard,
#LocalBoard, #stripNumber, level |
0 |
5.00E+03 |
no |
Run |
DAQ |
yes |
calib and
phys runs |
100 calib
events / run |
sub-event |
DAQ FXS/OCDB |
Yes |
yes |
1 |
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9 |
Look-up-Table (Trigger) |
32768 (15
adress bits) * 4 output bit word (2 bits for lpt and 2 bits for hpt) |
0 |
4.00E+06 |
no |
Each change of physics conditions |
First runs Simulation then real
data (DAQ) |
yes |
phys runs |
all events |
event |
DAQ FXS/OCDB |
Yes |
yes |
produced offline |
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10 |
HV values |
AliDCSValue |
0 |
150000 ; (minimum, variable) |
no |
Run |
DCS |
yes |
physics |
- |
event |
OCDB |
yes |
yes |
3 |
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3.16E+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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