HYPOLIT, A HIGH-RESOLUTION FAST BEAM RICH

Authors
BALLON J BERAT C BUENERD M CHAUVIN J HOSTACHY JY LAAMYEM M MARTIN P SGHAIER H STASSI P REYCAMPAGNOLLE M TOUILLON R VOLKEMER B
Citation
J. Ballon et al., HYPOLIT, A HIGH-RESOLUTION FAST BEAM RICH, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 343(1), 1994, pp. 218-221
Citations number
9
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
Journal title
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment → ACNP
ISSN journal
01689002
Volume
343
Issue
1
Year of publication
1994
Pages
218 - 221
Database
ISI
SICI code
0168-9002(1994)343:1<218:HAHFBR>2.0.ZU;2-8
Abstract
A new Cherenkov counter has been designed for on-line tagging of high energy particles, more specifically 270 GeV hyperons in WA89 experimen t at CERN. It is equipped with a 6 m focal length spherical mirror and a chromatic corrector. The ring size is reduced by a factor of 8 (adj ustable) by means of a set of two conical mirrors. The photon detector is an image intensifier. Its output window is divided in 160 pixels r ead with photomultipliers via optical fibres. The ring radius is deter mined electronically and a tagging signal is available in less than 2. 5 mus. HYPOLIT has been tested in a 220 GeV pion beam (50 murad diverg ence). A spatial resolution of 0.125 mm on the radius has been obtaine d, and the pion-kaon separation was better than 5sigma.