Author/Authors :
Müller، نويسنده , , U. and Beusch، نويسنده , , W. and Boss، نويسنده , , M. and Engelfried، نويسنده , , J. and Gerassimov، نويسنده , , S.G and Klempt، نويسنده , , W. and Lennert، نويسنده , , Packo P. and Martens، نويسنده , , K. Bruce Newbold، نويسنده , , D. and Rieseberg، نويسنده , , H. and Siebert، نويسنده , , H.-W. and Smith، نويسنده , , V.J and Thilmann، نويسنده , , O. and Wنlder، نويسنده , , G.، نويسنده ,
Abstract :
The Omega RICH, a large-aperture detector for identification of secondary pions, kaons, and (anti) protons was in operation at the CERN Omega spectrometer facility between 1984 and 1994. Cherenkov photons from a 5 m long radiator were detected in drift chambers with quartz windows, using TMAE-loaded counting gases. The RICH was used by experiments WA69 and WA82, until 1988. It was then equipped with new drift chambers and mirrors and was in use since 1990 in experiments WA89 and WA94. The setup in the WA89 hyperon beam experiment is described in more detail and efficiencies, resolutions, and physics results are discussed.
