Test of a large scale prototype of the dirc, a čherenkov imaging detector based on total internal reflection for babar at pep-ii

  • R. Aleksan
  • , L. Amerman
  • , D. Aston
  • , M. Benkebil
  • , P. Besson
  • , G. Bonneaud
  • , Ph Bourgeois
  • , D. Brown
  • , J. Chauveau
  • , A. Ciocio
  • , R. Cizeron
  • , A. De Lesquen
  • , L. Del Buono
  • , S. Emery
  • , A. Gaidot
  • , L. Gosset
  • , D. Hale
  • , G. Hamel De Monchenault
  • , O. Hamon
  • , C. Hearty
  • A. Jouenne, J. Kadyk, H. Kawahara, H. Krueger, G. London, M. Long, A. Lu, A. M. Lutz, G. Lynch, D. McShurley, B. Meadows, J. M. Noppe, E. Pasquetto, S. Plaszczynski, W. Pope, M. Pripstein, G. Przybylski, J. Rasson, B. N. Ratcliff, R. Reif, X. Sarazin, M. H. Schune, J. Schwiening, S. Sen, S. Shapiro, M. Sokoloff, H. Staengle, P. Stiles, J. D. Taylor, D. Therville, E. Torassa, G. Vasileiadis, G. Vasseur, J. Va'vra, M. Verderi, D. Warner, T. F. Weber, W. Wenzel, R. Wilson, G. Wormser, Ch Yèche, M. Zito

Research output: Contribution to journalArticlepeer-review

Abstract

The principles of the DIRC ring imaging Čherenkov technique are briefly explained and its choice for the BABAR detector particle identification system is motivated. A large scale prototype of the DIRC for the BABAR experiment is then described. Details of the design of this prototype and its test in a hadronic particle beam at the CERN-PS are presented, and results from various prototype and test configurations are given. For example, after correcting for geometrical acceptance and estimated collection effects, the number of photoelectrons was measured to be 146 ± 1.8 ± 9 cm-1, for a track angle of 20° at zero photon transmission distance. The effective attenuation loss was measured to be 4.1 ± 0.7% per meter of bar length, and the observed single photon resolution was 10.0 ± 0.2 mrad. This performance is consistent with what was expected from earlier tests and Monte Carlo simulations, and will be fully adequate for the physics demands of the BABAR experiment.

Original languageEnglish
Pages (from-to)261-282
Number of pages22
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume397
Issue number2-3
DOIs
Publication statusPublished - 1 Oct 1997

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