The BaBar instrumented flux return performance: Lessons learned

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

Research output: Contribution to journalConference articlepeer-review

8 Scopus citations


The BaBar Collaboration has operated an instrumented flux return (IFR) system covering over 2000 m2 with resistive plate chambers (RPCs) for nearly 3 years. The chambers are constructed of bakelite sheets separated by 2 mm. The inner surfaces are coated with linseed oil. This system provides muon and neutral hadron detection for BaBar. Installation and commissioning were completed in 1998, and operation began mid-year 1999. While initial performance of the system reached design, over time, a significant fraction of the RPCs demonstrated significant degradation, marked by increased currents and reduced efficiency. A coordinated effort of investigations have identified many of the elements responsible for the degradation. This article presents our current understanding of the aging process of the BaBar RPCs along with the action plan to combat performance degradation of the IFR system.

Original languageEnglish (US)
Pages (from-to)455-463
Number of pages9
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number1-3
StatePublished - Nov 21 2002
Externally publishedYes
EventINSTR02 - Novosibirisk, Russian Federation
Duration: Feb 28 2002Mar 6 2002

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation


  • Muon detectors
  • Particle detectors
  • Resistive plate chambers


Dive into the research topics of 'The BaBar instrumented flux return performance: Lessons learned'. Together they form a unique fingerprint.

Cite this