MCH#

Quality Summary#

[QC on EPN] mch-qualitysummary

The left panel show a summary of the automated checked on the MCH data, 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: immediately inform the MCH on-call * Medium: write a logbook entry, tagging MCH * Null: the plots are completely empty. Check in DCS if MCH is in STANBY. If not, inform the MCH on-call.

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.

If the quality in the trend plot is Bad for the whole duration of a run, MCH should be marked as Bad in the Bookkeeping flags for the run.

Quality Plots#

The following plots show the distribution of various estimators of the MCH data quality. Each horizontal bin shows the value of the monitored quantity, averaged over one Detection Element(DE). The vertical dashed lines show the boundaries between each of the 10 MCH chambers. An horizontal dashed line shows the threshold used by the checker to decide if a given detection element is considered good or bad.

The checker assigns an overall Good (green), Medium (orange) or Bad (red) quality flag to the plot, depending on the number and pattern of bad DEs. In general, the quality is still considered Good if only few DEs are bad. The quality is set to Medium if several DEs are Bad, but no significant impact on the detector acceptance is expected. If the number and pattern of bad DEs is such that the acceptance will be degraded, the quality is set to Bad.

The overall aggregated MCH quality is the logic AND of the qualities of the individual plots.

Fraction of Synchronized Boards#

[QC on EPN] $mch-syncfrac$

The plot shows, for each Detection Element, the fraction of FEC boards that are properly synchronized. A given DE is coinsidered bad if the corresponding fraction is below the horizontal dashed line.

Fraction of Boards not in Error#

[QC on EPN] $mch-noerrorfrac$

The plot shows, for each Detection Element, the fraction of FEC boards that do not have decoding errors. A given DE is coinsidered bad if the corresponding fraction is below the horizontal dashed line.

Fraction of Boards with Good Rate#

[QC on EPN] $mch-goodfrac$

The plot shows, for each Detection Element, the fraction of FEC boards that have a correct hit rate. A given DE is coinsidered bad if the corresponding fraction is below the horizontal dashed line.

Average Hit Rate#

[QC on EPN] mch-meanrate

The plot shows the average hit rate (in kHz) for each detection element. A given DE is coinsidered bad if the corresponding rate is below the horizontal dashed line.