MCH Evaluation

This package offers a few helpers to assess (some) performance of MCH.

The class ExtendedTrack converts a standalone MCH track (found in mchtracks.root files) into a track extrapolated to a vertex (that must be provided). It's a convenient object that also packs the clusters associated to the track (contrary to what's found in the mchtracks.root where tracks and clusters are in two different containers).

The o2-mch-compare-tracks-workflow can be used to produce many histograms (output is a root file and optionally a pdf file) comparing tracks from two different mchtracks.root files.

For instance to compare tracks coming from reconstructions using the two different clustering we have :

$ o2-mch-tracks-reader-workflow --hbfutils-config o2_tfidinfo.root --infile mchtracks.legacy.root | o2-mch-tracks-reader-workflow --hbfutils-config o2_tfidinfo.root --infile mchtracks.gem.root --subspec 1 | o2-mch-compare-tracks-worfklow --pdf-outfile compare.pdf -b
$ root
root[0] o2::mch::eval::drawAll("compare.root")

MCH Cluster Maps

• Goal : The general purpose is to track "unexpected" detector issues not well reproduced with MC simulations. These problems generate non-negligible bias in Acc*Eff corrections resulting in large tracking systematic uncertainties. During the data reconstruction, the status of the detector is calculated with the CCDB which is used to discard most of the detector issues. This status map is built with information based on pedestals, occupancy etc. (high and low voltage will be included soon in the statusmap.) Nevertheless, some detector issues (e.g. a cable swapping) are not well detected online and consequently not properly reproduced by the CCBD. The main objective of this code is to spot these issues not included in the status map.

• SRC FILE: clustermap-display.cxx

• INPUT FILES (see the following readme (x) for more info to understand how they are produced): DATA_QC.root MC_QC.root o2sim_geometry-aligned.root

• HELP MESSAGE TO KNOW WHICH OPTIONS ARE AVAILABLE:

o2-mch-clustermap-display --help

• EXECUTION COMMAND:

o2-mch-clustermap-display --green --normperarea --rootfileleft DATA_QC.root --rootfileright 100mil.root --help

• OUTPUT FILES:

Non-bending(NB):

CHAMBERS-1-NB.html CHAMBERS-2-NB.html CHAMBERS-3-NB.html CHAMBERS-4-NB.html CHAMBERS-5-NB.html CHAMBERS-6-NB.html CHAMBERS-7-NB.html CHAMBERS-8-NB.html CHAMBERS-9-NB.html CHAMBERS-10-NB.html

Bending(B):

CHAMBERS-1-B.html CHAMBERS-2-B.html CHAMBERS-3-B.html  CHAMBERS-4-B.html CHAMBERS-5-B.html CHAMBERS-6-B.html CHAMBERS-7-B.html CHAMBERS-8-B.html CHAMBERS-9-B.html  CHAMBERS-10-B.html