The BRAHMS ring imaging Cherenkov detector

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 570; no. 1; pp. 216 - 222
• Main Authors: Debbe, R., Jørgensen, C.E., Olness, J., Yin, Z.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.2007
• Subjects: High index of refraction; Photo-multiplier based RICH; RICH; 29.40.Ka; High index of refraction; RICH; 25.75.−q; Photo-multiplier based RICH
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/j.nima.2006.09.100

A Ring Imaging Cherenkov detector built for the BRAHMS experiment at the Brookhaven RHIC is described. This detector has a high index of refraction gas radiator. Cherenkov light is focused on a photo-multiplier based photon detector with a large spherical mirror. The combination of momentum and ring radius measurement provides particle identification from 2.5 to 35 GeV/ c for pions and kaons and well above 40 GeV/ c for protons during runs that had the radiator index of refraction set at n - 1 = 1700 × 10 - 6 .