ALICE Calibration Requirements | ||||||||||||||||||||||||||||||||||||||||||
TRD OK March 07 | ||||||||||||||||||||||||||||||||||||||||||
Par # | Parameter | Data format/size per channel | Data size (Total) | 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 | implemented in[1] | use case # | |||||||||||||||||||||||||||||
on FES | in OCDB (bytes) | reference (bytes) | ||||||||||||||||||||||||||||||||||||||||
1 | position of supermodule (cm,deg) | 18x6 float | 400 | 0 | year | survey | yes | - | - | - | DCDB | yes | sim and rec | - | ||||||||||||||||||||||||||||
2 | position of chamber (cm,deg) | 540x6 float | 1.20E+04 | 1.00E+08 | hour | HLT | yes | physics run | 1e5 pp events | - | HLT FES/OCDB | yes | sim and rec | 2 | ||||||||||||||||||||||||||||
3 | pad drift velocity factor | 1.2e6 ushort | 2.30E+06 | 8.00E+07 | year | HLT | yes | physics run | 1e8 pp events | - | HLT FES/OCDB | yes | sim and rec | 2 | ||||||||||||||||||||||||||||
4 | pad T0 (timebin) | 1.2e6 ushort | 2.30E+06 | 8.00E+07 | year | HLT | yes | physics run | 1e8 pp events | - | HLT FES/OCDB | yes | sim and rec | 2 | ||||||||||||||||||||||||||||
5 | pad gain factor | 1.2e6 ushort | 2.30E+06 | 1.50E+09 | year | HLT | yes | physics run | 1e8 pp events | - | HLT FES/OCDB | yes | sim and rec | 2 | ||||||||||||||||||||||||||||
6 | pad resp. func. Width (pad) | 1.2e6 ushort | 2.30E+06 | 5.00E+08 | year | HLT | yes | physics run | 1e8 pp events | - | HLT FES/OCDB | yes | sim | 2 | ||||||||||||||||||||||||||||
7 | chamber drift velocity (cm/timebin) | 540 float | 2.10E+03 | 4.00E+04 | hour | HLT | yes | physics run | 1e5 pp events | - | HLT FES/OCDB | yes | sim and rec | 2 | ||||||||||||||||||||||||||||
8 | chamber drift T0 (timebin) | 540 float | 2.10E+03 | 4.00E+04 | hour | HLT | yes | physics run | 1e5 pp events | - | HLT FES/OCDB | yes | sim and rec | 2 | ||||||||||||||||||||||||||||
9 | chamber gain | 540 float | 2.10E+03 | 7.00E+05 | hour | HLT | yes | physics run | 1e5 pp events | - | HLT FES/OCDB | yes | sim and rec | 2 | ||||||||||||||||||||||||||||
10 | dedx histogram2 | 55 hist | 5.20E+04 | 0 | year | Offline | yes | physics run or simulation | - | - | OCDB | yes | rec | - | ||||||||||||||||||||||||||||
11 | max timebin histograms | 55 hist | 5.20E+04 | 0 | year | Offline | yes | physics run or simulation | - | - | OCDB | yes | rec | - | ||||||||||||||||||||||||||||
12 | clock frequency (MHz) | 1 float | 0 | 0 | run | Whatever (see note1) | yes | - | - | - | DCS FES/OCDB | yes | rec | 5 | ||||||||||||||||||||||||||||
13 | number of timebins | 1 int | 1 | 0 | run | Config summary file | yes | - | - | - | DCS FES/OCDB | yes | sim and rec | 5 | ||||||||||||||||||||||||||||
14 | tail cancellation tau1 | 1 int | 0 | 0 | run | Config summary file | yes | - | - | - | DCS FES/OCDB | yes | ? | |||||||||||||||||||||||||||||
15 | tail cancellation tau2 | 1 int | 0 | 0 | run | Config summary file | yes | - | - | - | DCS FES/OCDB | yes | ? | |||||||||||||||||||||||||||||
16 | tail cancellation amplitude | 1 int | 0 | 0 | run | Config summary file | yes | - | - | - | DCS FES/OCDB | yes | ? | |||||||||||||||||||||||||||||
17 | pedestal | 1 int | 0 | 0 | run | Config summary file | yes | - | - | - | DCS FES/OCDB | yes | ? | |||||||||||||||||||||||||||||
18 | configuration id | 1024 char | 1000 | 0 | run | Config summary file | yes | - | - | - | DCS FES/OCDB | yes | ? | |||||||||||||||||||||||||||||
19 | gain table id | 1024 char | 1000 | 0 | year | Config summary file | yes | - | - | - | DCS FES/OCDB | yes | ? | |||||||||||||||||||||||||||||
20 | status byte of superm | 18 char | 0 | 0 | run | Whatever (see note1) | yes | - | - | - | DCS FES/OCDB | yes | sim via config | 5 | ||||||||||||||||||||||||||||
21 | status byte of chamber | 540 char | 510 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS FES/OCDB | yes | sim | 5 | ||||||||||||||||||||||||||||
22 | status byte of MCM | 6.7e4 char | 510 | 0 | run | Whatever (see note1) | yes | - | - | - | DCS FES/OCDB | yes | sim | 5 | ||||||||||||||||||||||||||||
23 | status byte of pad | 1.2e6 char | 1.10E+06 | 0 | run | Config summary file | yes | - | - | - | DCS FES/OCDB | yes | sim | 5 | ||||||||||||||||||||||||||||
24 | FEE gain correction | 1.2e6 ushort | 2.30E+06 | 0 | run | Whatever (see note1) | yes | - | - | - | DCS FES/OCDB | yes | - | 5 | ||||||||||||||||||||||||||||
25 | ADC thresholds | 1.2e6 char | 6.40E+05 | 0 | run | Whatever (see note1) | yes | - | - | - | DCS FES/OCDB | - | 5 | |||||||||||||||||||||||||||||
26 | pretrigger information | 1024 char | 1.00E+03 | 0 | run | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
27 | drift velocity monitor HV | 1 float | 0 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
28 | drift velocity monitor peak1 pos | 1 float | 0 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
29 | drift velocity monitor peak2 pos | 1 float | 0 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
30 | drift velocity monitor peak1 area | 1 float | 0 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
31 | drift velocity monitor peak2 area | 1 float | 0 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
32 | drift velocity monitor temp1 | 1 float | 0 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
33 | drift velocity monitor temp2 | 1 float | 0 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
34 | drift velocity monitor pressure | 1 float | 0 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
35 | drift velocity monitor velocity | 1 float | 0 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | ? | 4 | |||||||||||||||||||||||||||||
36 | drift velocity monitor gain1 | 1 float | 0 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
37 | drift velocity monitor gain2 | 1 float | 0 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
38 | drift velocity monitor CO2 | 1 float | 0 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
39 | drift velocity monitor N2 | 1 float | 0 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
40 | environment temperature | 540 float | 210 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
41 | chamber anode currents | 540 float | 210 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
42 | chamber drift currents | 540 float | 210 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
43 | chamber anode voltages | 540 float | 410 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
44 | chamber drift volatges | 540 float | 410 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
45 | low voltage voltage | 1080 float | 410 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
46 | low voltage current | 1080 float | 410 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
47 | atmospheric pressure | 1 float | 0 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
48 | luminosity | 1 float | 0 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
49 | magnetic field | 1 float | 0 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | sim/rec via config | 4 | |||||||||||||||||||||||||||||
50 | O2 content in gas | 1 float | 0 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
51 | chamber gas overpressure | 1 float | 0 | 0 | minute | DCS Archive DB | yes | - | - | - | DCS ArchiveDB/OCDB | - | 4 | |||||||||||||||||||||||||||||
1.34E+07 | 2.26E+09 | |||||||||||||||||||||||||||||||||||||||||
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. | ||||||||||||||||||||||||||||||||||||||||||
Please note that the meaning of the last column is whether or not the variable is actually supposed to be used in the simulation and reconstruction software, and if yes, whether it has been implemented yet. (I changed its name ) The pink fields mean it is not quite sure yet that it is needed, red means it has to be implemented. | ||||||||||||||||||||||||||||||||||||||||||
Note 1 | solution
1: whenever a configuration is loaded,
the version number will be recorded in the PVSS archive. This version number
can be accessed by the shutle. The full configuration record can be stored in
the OCDB and the configuration version will be a pointer to this data.
Drawback - all configuration data must be available on DCDB before its first
use Solution 2: the configuration parameters required by offline will always archived. Drawback: our archive will unecessary grow. As the stored information is not needed for DCS operation, I do not like this approach Solution 3: the configuration parameters will be stored as files on the file exchange server and will be picked-up by shuttle. Now, the duplication of information will be on the OCDB side. |