Latest results on the performance of the multigap resistive plate chamber used for the ALICE TOF

• DOI: 10.1016/j.nima.2004.07.004
• Publication Date: 2004-07-27T21:39:35Z
• Authors: A.N. Akindinov; A. Alici; F. Anselmo; P. Antonioli; M. Basile; G. Cara Romeo; L. Cifarelli; F. Cindolo; F. Cosenza; I. D'Antone; A. De Caro; S. De Pasquale; A. Di Bartolomeo; M. Fusco Girard; V. Golovine; M. Guerzoni; M. Guida; D. Hatzifotiadou; A.B Kaidalov; D.H. Kim; D.W. Kim; S.M. Kisselev; G. Laurenti; K. Lee; S.C. Lee; E. Lioublev; M.L. Luvisetto; A. Margotti; A.N. Martemiyanov; F. Massera; S. Meneghini; R. Michinelli; R. Nania; P. Otiougova; G. Pancaldi; A. Pesci; R. Pilastrini; O. Pinazza; P.A. Polozov; M. Rizzi; E. Scapparone; G. Scioli; S.B. Sellitto; F. Semeria; S. Serra; A.V. Smirnitski; M.M. Tchoumakov; E. Ugolini; E. Usenko; G. Valenti; K.G. Voloshin; M.C.S. Williams; B.V. Zagreev; C. Zampolli; A. Zichichi; A. Zucchini; M. Zuffa
• Keywords: Resistive touchscreen; STRIPS; Momentum (technical analysis); Particle identification

Abstract For the identification of particles in the momentum range 0.5– 2.5 GeV / c , the ALICE experiment uses a Time Of Flight array consisting of Multigap Resistive Plate Chambers (MRPC) in the form of long strips. The design of the detector elements is as follows : double stack MRPCs with glass resistive plates and 5 gas gaps of 250 μ m per stack. The latest results on the performance of these MRPCs are presented. Typical values of time resolution σ are better than 50 ps, with an efficiency of 99.9 % and a long, more than 1.5 kV, streamer-free plateau.