SVD DBStore
Contents
21.8. SVD DBStore#
Here we briefly describe the SVD objects that populate the Conditions Database. We also report the revision number which is used for experiment 0 and 1003.
Note
the revision can be different for official run-independent MC production of experiment 0 and 1003, please check the corresponding Global Tag.
for run-dependent and data reconstruction revisions should be checked inspecting the content of the corresponding Global Tags.
you can also check the SVD Payloads, Revisions and GT Confluence Page.
We add a string, the UniqueID
, to the payloads that provides informations on the content of the payload. In order to read the UniqueID
you can setup basf2 and then:
> b2conditionsdb dump -r YZT X
where YZT
is the payload name and X
is the revision number. The UniqueID
will show up at the end.
Wrappers have one of the following granularity:
strip granularity: one value/payload per strip
sensor-side granularity: one value/payload per sensor side
detector granularity: one value/payload for all sensors
sensor-on-ladder granularity: one value/payload per sensor side integrated over all ladders
21.8.1. Simulation Calibrations#
In simulation, sensors are grouped by type (L3, origami, backward, forward) and by side (u/P, v/N). Sensors in the same group share the same calibration constants.
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class SVDChargeSimulationCalibrations#
Parameters for strip charge simulation, with sensor-side granularity:
electron weight: describing the difference between Geant4 electrons/holes and real electrons/holes
coupling constants: describe the charge sharing among implants up to readout-to-next-to-next-to-floating
Check ChargeSimulation@CDB all revisions available in the Conditions Database. Revision 4 is used for experiment 0 and 1003.
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class SVDMCClusterPositionFudgeFactor#
Parameter to fudge position reconstruction in simulation, to match resolution measured in data, with sensor-side granularity:
fudge factor: width of the gaussian from which we draw a random number to be added to the reconstructed cluster position, depends on the track incident angle
Check MCPositionFudge@CDB all revisions available in the Conditions Database. Revision 5 is used for experiment 0 and 1003.
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class SVDMCClusterTimeFudgeFactor#
Parameter to fudge time reconstruction in simulation, to match resolution measured in data, with sensor-side granularity:
fudge factor: width of the gaussian from which we draw a random number to be added to the reconstructed cluster time
Check MCTimeFudge@CDB all revisions available in the Conditions Database. Revision 3 is used for experiment 0 and 1003, and run-dependent MC.
The local calibrations wrappers SVDNoiseCalibrations, SVDPulseShapeCalibrations and SVDFADCMaskedStrips are also used in the digitizer.
21.8.2. Local Calibrations#
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class SVDNoiseCalibrations#
Wrapper with strip granularity storing the strip noise
Check Noise@CDB all revisions available in the Conditions Database. Revision 510 is used for experiment 0 and 1003.
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class SVDPulseShapeCalibrations#
Wrapper with strip granularity storing strip gain (ADC/e-), peak time and pulse width
Check PulseShape@CDB all revisions available in the Conditions Database. Revision 538 is used for experiment 0 and 1003.
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class SVDFADCMaskedStrips#
Wrapper with strip granularity storing the strips masked on FADC
Check MaskedStrips@CDB all revisions available in the Conditions Database. Revision 108 is used for experiment 0 and 1003.
21.8.3. Detector Configuration#
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class SVDGlobalConfigParameters#
Stores the detector configuration for the Belle2 run, with detector granularity
Check GlobalConfig@CDB all revisions available in the Conditions Database. Revision 70 is used for experiment 0 and 1003.
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class SVDLocalConfigParameters#
Stores the detector configuration for a local run, with detector granularity
Check LocalConfig@CDB all revisions available in the Conditions Database. Revision 63 is used for experiment 0 and 1003.
21.8.4. Reconstruction Calibrations#
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class SVDRecoConfiguration#
Stores SVDRecoConfiguration (time, position, charge, etc), with detector granularity
Check SVDRecoConfiguration@CDB all revisions available in the Conditions Database. Revision 10 is used for experiment 0 (with grouping module turned ON), revision 11 is used for experiment 1002/3/4.
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class SVDCoGOnlyPositionError#
Stores the position error formulas for the
CoGOnly
algorithm, with the same granularity as simulation objects
Check CoGOnlyErr@CDB all revisions available in the Conditions Database. Revision 5 is used for exp 0, 1003 and data reconstruction.
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class SVDCoGOnlyErrorScaleFactors#
Stores the position error scaling factors for the
CoGOnly
algorithm, with the same granularity as simulation objects
Check CoGOnlySF@CDB all revisions available in the Conditions Database. Revision 2 (scale factors = 1) is used for exp 0, 1003 and data reconstruction. While revision 6 (scale factors != 1) is used for data.
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class SVDOldDefaultErrorScaleFactors#
Stores the position error scaling factors for the
OldDefault
algorithm, with the same granularity as simulation objects
Check OldDefaultSF@CDB all revisions available in the Conditions Database. Revision 3 is used for experiment 0 and 1003. Revision 2 (scale factors = 1) should be used for data reconstruction.
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class SVDClustering#
Stores the parameters for the clusterization with sensor-side granularity
Check Clustering@CDB all revisions available in the Conditions Database. Revision 1 is used for experiment 0 and 1003, and data.
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class SVDHitTimeSelection#
Stores the functions and their parameters for the selection of clusters based on the cluster time in the SpacePoint creation step, with sensor-side granularity.
Check HitTimeSelection@CDB all revisions available in the Conditions Database. Revision 1 (no cuts) is used for experiment 1003 (and data), and revision 5 (u/v cluster time difference < 20 ns & u-or-v cluster absolute time < 50 ns) is used for experiment 0.
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class SVDOccupancyCalibrations#
wrapper with the strip occupancy averaged over a run, strip granularity
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class SVDHotStripsCalibrations#
wrapper with the hot strips as determined by
SVDHotStripFinder
, strip granularity
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class SVDTimeGroupingConfiguration#
Stores parameters used in SVDTimeGrouping module, with detector granularity
Check SVDTimeGroupingConfiguration@CDB all revisions available in the Conditions Database. Revision 3 is used for experiment 0 and 1003/4, revision 4 is calculated from Exp24-Run1726 and should be used for data.
21.8.5. Time Calibrations#
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class SVDCoGTimeCalibrations#
CoG6 Time calibration wrapper, with sensor-side granularity
Check CoG6Time@CDB all revisions available in the Conditions Database. Revision 203 is used for experiment 0 and 1003, revision 7 correspond to no calibration.
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class SVD3SampleCoGTimeCalibrations#
CoG3 Time calibration wrapper, with sensor-side granularity
Check CoG3Time@CDB all revisions available in the Conditions Database. Revision 2 is used for experiment 0 and 1003, revision 1 correspond to no calibration.
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class SVD3SampleELSTimeCalibrations#
ELS3 Time calibration wrapper, with sensor-side granularity
Check ELS3Time@CDB all revisions available in the Conditions Database. Revision 2 is used for experiment 0 and 1003, revision 1 correspond to no calibration.
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class SVDClusterTimeShifter#
Time shift adjustment depending on cluster-size, with sensor-on-ladder granularity
Check SVDClusterTimeShifter@CDB all revisions available in the Conditions Database. Revision 1 is used for experiment 0 and 1002/3/4 which corresponds to no shift, revision 3 is calculated from Exp24,Run1726 and should only be used for data.