We describe the design, construction and performance of a Ring Imaging Cherenkov Detector (RICH) constructed to identify charged particles in the CLEO experiment. Cherenkov radiation occurs in LiF crystals, both planar and ones with a novel "sawtooth"-shaped exit surface. Photons in the wavelength interval 135-165 nm are detected using multi-wire chambers filled with a mixture of methane gas and triethylamine vapor. Excellent π/K separation is demonstrated.
|Original language||English (US)|
|Number of pages||48|
|Journal||Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment|
|State||Published - Dec 1 2005|
Bibliographical noteFunding Information:
The CLEO RICH project was funded primarily by the U.S. National Science Foundation which we deeply appreciate. We thank both the National Science Foundation and Department of Energy for supporting the University groups. We thank the late Tom Ypsilantis and Jacques Séguinot for early work on a similar system and for extensive discussions. Jeff Cherwinka helped with many engineering aspects of the system. Lee Greenler of PSL laboratories of University of Wisconsin did much of the mechanical design. We thank Einar Nygard and Bjorn Sundal of IDEAS for their work on the front-end hybrid design. Paul Gelling contributed to the electronics infrastructure. We especially appreciate the efforts of Charles Brown, Lou Buda and Lester Schmutzer of the Syracuse Physics Department of machine shop who made many of the components. We thank Peter Reed, Heather Lane, Dave Smith, Don Moulton at Optovac for their hard work during the four years of crystal production. Ken Powers helped with the plating of the windows. We thank the accelerator group at CESR for excellent efforts in supplying luminosity.