Timing Measurements in the Vertical Roman Pots of the TOTEM Experiment

The TOTEM upgrade programme focusses on improving the experiment's capability to explore and measure new physics in Central Diffractive processes in two complementary projects, both based on the installation of proton-time-of-flight detectors in Roman Pots to reconstruct the longitudinal vertex position and thus to assign the proton vertex to the correct central CMS tracker vertex in the presence of event pileup. The present TDR discusses the instrumentation developments, physics potential and performance for operation with a $\beta^{*}$ = 90 m beam optics, for which the vertical Roman Pots will be equipped with timing detectors with ~50ps resolution. In this scenario, the leading proton acceptance covers all diffractive masses, provided that the protons' four-momentum transfer |t| > ~ 0.01 GeV$^{2}$. In contrast, the second project, the CMS-TOTEM Precision Proton Spectrometer (CT-PPS) for standard LHC fills at low $\beta^{*}$ targeting processes with high diffractive masses (> 300 GeV) and leading protons in the horizontal Roman Pots is described in another TDR.