Skip to content

CBTK (Central Barrel Tracking)#

Quality Summary#

[QC on EPN]itstpc-qualitysummary

The left panel shows a summary of the automated checked on the central barrel tracks, in a human-readable format. The top line describes the aggregated quality status, followed by a message suggesting the appropriate action according to the quality level:

  • Bad: write a logbook entry, tagging RC, TPC and ITS

  • Medium: write a logbook entry, tagging RC, TPC and ITS

  • Null: the plots are completely empty. Check in QC the individual qualities of TPC and ITS. If they are both Good, write a logbook entry, tagging RC, TPC and ITS.

The right panel shows a trending plot of the aggregated quality. The message in the left panel always corresponds to the most recent point in the trending plot.

Quality Plots - Matching efficiencies#

The following plots show the distribution of the TPC-ITS matching efficiency as a function of different kinematic variables (eta, azimuthal angle and transverse momentum). The matching efficiency is computed as the ratio of the distribution of the ITS+TPC tracks over the ITS-only tracks. An horizontal dashed line shows the minimum acceptable matching efficiency value used by the checker to decide if the tracking is considered good or bad.

The quality for each bin is indicated by a colored squre

The overall aggregated central barrel tracks quality is the logic AND of the qualities of the individual plots.

Matching efficiency versus eta#

[QC on EPN - plot integrated over 10min]

itstpc-syncfracok

The plot shows the ITS-TPC matching efficiency as function of the track eta variable. Horizontal dashed lines indicate the range, which is used for the check.

Matching efficiency versus azimuthal angle#

[QC on EPN - plot integrated over 10min]

itstpc-syncfracok

The plot shows the ITS-TPC matching efficiency as function of the track azimuthal angle.

Matching efficiency versus transverse momentum#

[QC on EPN - plot integrated over 10min]

itstpc-syncfracok

The plot shows the MCH+MID matching efficiency as function of the track transverse momentum. Horizontal dashed lines indicate the range, which is used for the check.

Matching efficiency - Comparrison with Reference Run#

[QC on EPN - plot integrated over 10min] The third row shows the comparrison of the matching efficiency of the current run (green symbols) with a reference run (black symbols) (Upper plot). The ratio between the current and the reference run is shown in the lower plot.

itstpc-syncfracok

Known issues#