J. Engelfried et al., THE E781 (SELEX) RICH DETECTOR, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 409(1-3), 1998, pp. 439-442
First results from a new RICH detector, operating in an experiment cur
rently taking data - Fermilab E781 (SELEX), are presented. The detecto
r utilizes a matrix of 2848 phototubes for the photocathode. In a 650
GeV/c pi(-) beam the number of photons detected is 14 per ring, giving
a figure of merit N-0 of 106 cm(-1). The ring radius resolution obtai
ned is 1.2%. Results showing the particle identification ability of th
e detector are discussed. (C) 1998 Elsevier Science B.V. All rights re
served.