SPHINX phototube RICH detector for diffractive production experiments at Serpukhov accelerator

Abstract The RICH detector used in the SPHINX experiment at the Serpukhov accelerator is described. The optical system of this detector consists of two spherical mirrors with focal length of 125 cm. Two matrices with 736 phototubes in total are used for the photocathode. The standard performance characteristics of the detector are a value of 42 cm −1 for N 0 and a single hit resolution of 0.5 cm . Particle identification capability of the detector is discussed.