Roman Pot Detector Modelling and Proton Reconstruction in the TOTEM Experiment at the LHC

The objective of the TOTEM experiment at the LHC is the measurement of the total proton-proton cross-section with the luminosity-independent method based on the Optical Theorem, which requires studying both the elastic scattering cross-section and the inelastic (diffractive) processes. Movable insertions known as Roman Pot detectors provide the essential coverage of the high-rapidity region, enabling detection of forward protons at just a few millimetres from the beam centre. Precise computer model of the Roman Pot detectors geometry, which is crucial to simulation and analysis of both simulated and real event data was developed. Its accuracy was verified both visually and numerically. Finally, simulations of diffractive events were performed to validate its correctness.