Timing performance of Mean Timer reconstruction in the CMS Drift Tubes

The Mean Timer (MT) method to reconstruct track segments in the Drift Tube (DT) was described in detail here.

The same method was applied on LHC Run II data.

The plot shows the distribution of the measured track segment time for two different runs: one with LHC bunch spacing of 50 ns and the other one with 25 ns bunch spacing.

The normalization of the two histograms is arbitrary. They show that the MT is efficient to reconstruct tracks as far in time from the triggering bunch crossing as 200 ns, as we expected from the simulation.

The superimposition of the two histograms makes the beam structure visible in the two different configurations, with the even peaks of the 25 ns histogram (blue) superimposed to the 50 ns ones (red).

Distribution of the DT track segment time, determined with the MT reconstruction method, for a LHC bunch spacing of 50 ns (red) and a spacing of 25 ns (blue)

-- FrancescaCavallo - 2015-12-14