LHC optics measurement with proton tracks detected by the Roman pots of the TOTEM experiment

Antchev, G. and Aspell, P. and Atanassov, I. and Avati, V. and Baechler, J. and Berardi, V. and Berretti, M. and Bossini, E. and Bottigli, U. and Bozzo, M. and Brücken, E. and Buzzo, A. and Cafagna, F. S. and Catanesi, M. G. and Covault, C. and Csanád, Máté and Csörgő, Tamás and Deile, M. and Doubek, M. and Eggert, K. and Eremin, V. and Ferro, F. and Fiergolski, A. and Garcia, F. and Georgiev, V. and Giani, S. and Grzanka, L. and Hammerbauer, J. and Heino, J. and Hilden, T. and Nemes, Frigyes and Sziklai, János István (2014) LHC optics measurement with proton tracks detected by the Roman pots of the TOTEM experiment. NEW JOURNAL OF PHYSICS, 16. ISSN 1367-2630

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Abstract

Precise knowledge of the beam optics at the LHC is crucial to fulfill the physics goals of the TOTEM experiment, where the kinematics of the scattered protons is reconstructed with the near-beam telescopes – so-called Roman Pots (RP). Before being detected, the protons’ trajectories are influenced by the magnetic fields of the accelerator lattice. Thus precise understanding of the proton transport is of key importance for the experiment. A novel method of optics evaluation is proposed which exploits kinematical distributions of elastically scattered protons observed in the RPs. Theoretical predictions, as well as Monte Carlo studies, show that the residual uncertainty of this optics estimation method is smaller than 2.5 h.

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