Status of construction and first tests of the CLEO III RICH

Author

Artuso, M. ; Azfar, F. ; Efimov, A. ; Kopp, S. ; Mountain, R. ; Schuh, S. ; Skwarnicki, T. ; Stone, S. ; Viehhauser, G. ; Anderson, S. ; Smith, A. ; Kubota, Y. ; Lipeles, E. ; Coan, T. ; Staeck, J. ; Fadeyev, V. ; Volobouev, I. ; Ye, J.

Author_Institution

Syracuse Univ., NY, USA

fYear

1997

fDate

9-15 Nov 1997

Firstpage

348

Abstract

The CLEO collaboration is preparing a major upgrade of its present detector including a RICH detector for particle identification. This subdetector system follows the `proximity focussing´ design and uses LiF crystal radiators and MWPCs filled with a CH₄/TEA gas mixture as photon detector. Part of the radiator crystals will have the new `sawtooth´ geometry. We have constructed two of the 30 detector modules and tested these together with the first planar and `sawtooth´ radiator crystals in a muon halo beam at Fermilab. For the measurement of the Cherenkov angle we obtain a single photon measurement error of 13.5 mrad for the conventional planar radiator. With 14 detected photons we find a resolution per track of 4.5 mrad. In the first measurement ever of a `sawtooth´ radiator we achieve a resolution of 11.8 mrad for single photons and 4.8 mrad per track for 12.3 detected photons with a reduced geometric acceptance. These results fulfil CLEO III requirements

Keywords

Cherenkov counters; gamma-ray detection; muon detection; CLEO III; LiF; RICH detector; muon halo beam; particle identification; proximity focussing; sawtooth radiator crystals; single photon measurement; Collaboration; Crystalline materials; Detectors; Optical distortion; Optical reflection; Optical refraction; Optical surface waves; Optoelectronic and photonic sensors; Photonic crystals; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium, 1997. IEEE

Conference_Location

Albuquerque, NM

ISSN

1082-3654

Print_ISBN

0-7803-4258-5

Type

conf

DOI

10.1109/NSSMIC.1997.672600

Filename

672600