Performances of RPCs in the BaBar experiment

F. Anulli,R. Baldini,H. Band,R. Bionta,J. Brau,V. Brigljevic,A. Buzzo,A. Calcaterra,M. Carpinelli,T. Cartaro,N. Cavallo,G. Crosetti,G. De Nardo,R. De Sangro, A. Eichenbaum,D. Falciai,F. Fabozzi,F. Ferroni,G. Finocchiaro,F. Forti,R. Frey,J. Johnson,C. Gatto,E. Grauges-Pous,M. Iwasaki,D. Lange,L. Lista,M. Lo Vetere,C. Lu, H. Neal, N. Neri,M. Macri,B. Messener,M.R. Monge,T. Moore,S. Morganti,A. Palano,E. Paoloni,P. Paolucci, S. Passaggio,F. Pastore,C. Patrignani,P. Patteri,I. Peruzzi,D. Piccolo,M. Piccolo,G. Piredda, A. Pompili,E. Robutti, A. Roodman,A. Santroni,C. Sciacca,N. Sinev, A. Soha,D. Storm, S. Tosi,J. Va'vra, Y. Xie,D. Wright,W. Wisniewski

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment（2003）

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摘要

The BaBar experiment uses a big system based on RPC detectors to discriminate muons from pions and to identify neutral hadrons. About 2000m2 of RPC chambers have been working at SLAC since the end of 1998. We report on the performances of the RPC chambers focusing on new problems discovered in the RPC behaviour. These problems started very soon after the installation of the chambers on the detector when the high-ambient temperature triggered an increase of dark currents inside the chambers and a reduction of the efficiency. Careful analysis of the BaBar data and dedicated R&D efforts in the laboratory have helped to identify the main source of the trouble in the linseed oil varnish on the bakelite electrodes.

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关键词

BaBar,RPCs,IFR

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