20.8. 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

20.8.1. 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.

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.

The local calibrations wrappers SVDNoiseCalibrations, SVDPulseShapeCalibrations and SVDFADCMaskedStrips are also used in the digitizer.

20.8.2. Local Calibrations¶

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.

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.

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.

20.8.3. Detector Configuration¶

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.

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.

20.8.4. Reconstruction Calibrations¶

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 2 is used for exp 0, 1003 and data reconstruction.

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.

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.

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.

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.

class SVDOccupancyCalibrations¶: wrapper with the strip occupancy averaged over a run, strip granularity

class SVDHotStripsCalibrations¶: wrapper with the hot strips as determined by SVDHotStripFinder, strip granularity

20.8.5. Time Calibrations¶

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.

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.

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.