DocumentCode :
1390148
Title :
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
Volume :
45
Issue :
3
fYear :
1998
fDate :
6/1/1998 12:00:00 AM
Firstpage :
643
Lastpage :
647
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 Lithium Fluoride (LiF) crystal radiators and MWPCs as photon detectors. These chambers are filled with a CH4/TEA gas mixture and have a Calcium Fluoride (CaF2) crystal photon entrance window. 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; multiwire proportional chambers; CH4/TEA gas mixture; CLEO III RICH; CaF2; CaF2 crystal photon entrance window; Cherenkov angle; LiF; particle identification; reduced geometric acceptance; single photon measurement error; Calcium; Collaboration; Detectors; Geometrical optics; Lithium compounds; Measurement errors; Mesons; Photonic crystals; Structural beams; Testing;
fLanguage :
English
Journal_Title :
Nuclear Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9499
Type :
jour
DOI :
10.1109/23.682470
Filename :
682470
Link To Document :
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