The TOTEM detector at LHC

G. Antchev, P. Aspell, I. Atanassov, V. Avati, V. Berardi, M. Berretti, M. Bozzo, E. Br̈ucken, A. Buzzo, F. Cafagna, M. Calicchio, M. G. Catanesi, M. A. Ciocci, M. Csańad, T. Cs̈org.o, M. Deile, E. D́enes, E. Dimovasili, M. Doubek, K. EggertF. Ferro, F. Garcia, S. Giani, V. Greco, L. Grzanka, J. Heino, T. Hilden, M. Janda, J. Ka.spar, J. Kopal, V. Kundŕat, K. Kurvinen, S. Lami, G. Latino, R. Lauhakangas, E. Lippmaa, M. Lokaj́i.cek, M. Lo Vetere, F. Lucas Rodriguez, M. MacŔi, G. Magazz̀u, S. Minutoli, H. Niewiadomski, G. Notarnicola, T. Novak, E. Oliveri, F. Oljemark, R. Orava, M. Oriunno, K. Osterberg, E. Pedreschi, J. Peẗaj̈aj̈arvi, M. Quinto, E. Radermacher, E. Radicioni, F. Ravotti, E. Robutti, L. Ropelewski, G. Ruggiero, A. Rummel, H. Saarikko, G. Sanguinetti, A. Santroni, A. Scribano, G. Sette, W. Snoeys, W. Spearman, F. Spinella, A. Ster, C. Taylor, A. Trummal, N. Turini, V. Vacek, M. Vitek, J. Whitmore, J. Wu

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The TOTEM experiment, small in size compared to the others at the LHC, is dedicated to the measurement of the total proton-proton cross-section with the luminosity-independent method and to the study of elastic and diffractive scattering. To achieve optimum forward coverage for charged particles emitted by the pp collisions in the interaction point IP5, two tracking telescopes, T1 and T2, are installed on each side in the pseudo-rapidity region between 3.1 and 6.5, and Roman Pot (RP) stations are placed at distances of 147m and 220m from IP5. The telescope closest to the interaction point (T1, centered at z = 9 m) consists of Cathode Strip Chambers (CSC), while the second one (T2, centered at 13.5 m), makes use of Gas Electron Multipliers (GEM). The proton detectors in the RPs are silicon devices designed by TOTEM with the specific objective of reducing down to a few tens of microns the insensitive area at the edge. High efficiency as close as possible to the physical detector boundary is an essential feature. It maximizes the experimental acceptance for protons scattered elastically or diffractively at polar angles down to a few micro-radians. To measure protons at the lowest possible emission angles, special beam optics have been developed, optimizing acceptance and resolution. The read-out of all TOTEM subsystems is based on the custom-designed digital VFAT chip with trigger capability.

Original languageEnglish
Title of host publicationProceedings of the 13th International Conference on Elastic and Diffractive Scattering (Blois Workshop), EDS 2009
Number of pages7
ISBN (Print)9789290833420
Publication statusPublished - Jan 1 2010
Event13th International Conference on Elastic and Diffractive Scattering, EDS 2009 - Geneva, Switzerland
Duration: Jun 29 2009Jul 3 2009

Publication series

ISSN (Print)2078-8835


Other13th International Conference on Elastic and Diffractive Scattering, EDS 2009

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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  • Cite this

    Antchev, G., Aspell, P., Atanassov, I., Avati, V., Berardi, V., Berretti, M., Bozzo, M., Br̈ucken, E., Buzzo, A., Cafagna, F., Calicchio, M., Catanesi, M. G., Ciocci, M. A., Csańad, M., Cs̈org.o, T., Deile, M., D́enes, E., Dimovasili, E., Doubek, M., ... Wu, J. (2010). The TOTEM detector at LHC. In Proceedings of the 13th International Conference on Elastic and Diffractive Scattering (Blois Workshop), EDS 2009 (pp. 449-455). (CERN-Proceedings). CERN.