TRD

Layout for cosmic runs

Note:

• all QC tasks for TRD are running on the EPNs

Data size per sector

The TRD has 18 sectors which should all produce a similar data size per TF. In case on sector is deviating a lot (its mean is more/less than factor 3 from the rest) please write a bookkeeping entry tagging TRD.

Tracklet distribution in half-chambers

This plot shows the number of tracklets per half-chamber. The x-axis is the sector number. If you see one column completely empty please notify the TRD oncall.

The crosses on the plot are from a static half-chamber status map which needs to be replaced by a dynamic one to correctly cross out half-chambers where no data is expected because of hardware issues.

Eta-phi distribution of ITS-TPC-TRD tracks

This plot will be empty if either ITS or TPC is missing in the run. This is expected and not a problem.

Eta-phi distribution for ITS-TPC tracks matched to at least 3 TRD tracklets. The PHOS-hole from abs(eta) < 0.2 and phi ~ 5 leads to almost no tracks in that region. No need to call TRD expert if plot does not look as example above. We are currently adding automatic checks.

Pulse height plot based on TRD digit data only

A peak should be visible between timebin 0 and 6. If that is not the case there might be an issue with the trigger settings. Please notify the TRD oncall in that case.

Number of tracklets per event and TF

We would like to be notified via bookkeeping entry in case either more than one distinct peaks are appearing in the distributions or in case there are entries in the underflow bin in either of the two histograms.