Operation of the Cherenkov detector DIRC of BABAR at high luminosity

• DOI: 10.1109/nssmic.2000.949924
• Publication Date: 2002-11-11T11:52:19Z
• Authors: I. Adam; R. Aleksan; D. Aston; M. Benkebil; D. Bernard; G. Bonneaud; F. Brochard; D.N. Brown; P. Bourgeois; J. Chauveau; J. Cohen-Tanugi; M. Convery; G. de Domenico; A. de Lesquen; S. Emery; S. Ferrag; A. Gaidot; T. Geld; G. Hamel de Monch...; C. Hast; A. Hoecker; R.W. Kadel; J. Kadyk; M. Krishnamurthy; H. Lacker; G.W. London; A. Lu; A.-M. Lutz; G. Lynch; G. Mancinelli; F. Martinez-Vidal; N. Mayer; B.T. Meadows; D. Muller; S. Plaszczynski; M. Pripstien; B.N. Ratcliff; L. Roos; E. Roussot; M.-H. Schyne; J. Schwiening; V. Shelkov; M.D. Sokoloff; S. Spainer; J. Stark; A.V. Telnov; C. Thiebaux; G. Vasileiadis; G. Vasseur; J. Va'vra; M. Verderi; W.A. Wenzel; R.J. Wilson; G. Wormser; C. Yeche; S. Yellin; M. Zito
• Keywords: Cherenkov detector; Particle identification

The DIRC (acronym for Detection of Internally Reflected Cherenkov (light)) is the ring imaging detector BABAR at PEP-II SLAC. It provides identification pions, kaons and protons momenta up to 4 GeV/c with high efficiency. This needed reconstruct CP-violating B-decay final states provide B-meson flavour tagging time dependent asymmetry measurements. radiators consists long rectangular bars made synthetic fused silica photon a water tank equipped an array 10.752 conventional photomultipliers. At end year 2000 has recorded about 22 million B~B pairs reaching design luminosity L=3/spl middot/10/sup 33//cm/sup 2/s. ability keep beam background level low highest collision rates term reliability components during continuous data taking are requirements accomplish its physics program.