Studies of Proximity Focusing RICH with an aerogel radiator using Flat-panel multi-anode PMTs (Hamamatsu H8500)

Abstract

A proximity focusing ring imaging Cherenkov detector using aerogel as the radiator has been studied for an upgrade of the Belle detector at the KEK-B-factory. We constructed a prototype Cherenkov counter using a 4 x 4 array of 64-channel flat-panel multi-anode PMTs (Hamamatsu H8500) with a large effective area. The aerogel samples were made with a new technique to obtain a higher transmission length at a high refractive index (n=1.05). Multi-channel PMTs are read-out with analog memory chips. The detector was tested at the KEK-PS pi2 beam line in November, 2002. To evaluate systematically the performance of the detector, tests were carried out with various aerogel samples using pion beams with momenta between 0.5 GeV/c and 4 GeV/c. The typical angular resolution was around 14 mrad, and the average number of detected photoelectrons was around 6. We expect that pions and kaons can be separated at a 4 sigma level at 4 GeV/c.

19 pages, 15 figures. Submitted to Nucl.Instrum.Meth. A

References in corpus (3)

• Study of a Threshold Cherenkov Counter Based on Silica Aerogels with Low Refractive Indices
• The HERMES Dual-Radiator Ring Imaging Cerenkov Detector
• Tests of a proximity focusing RICH with aerogel as radiator

Cited by in corpus (9)

• A novel type of proximity focusing RICH counter with multiple refractive index aerogel radiator
• Study of a nonhomogeneous aerogel radiator in a proximity focusing RICH detector
• Large-area silica aerogel for use as Cherenkov radiators with high refractive index, developed by supercritical carbon dioxide drying
• Particle identification performance of the prototype Aerogel RICH counter for the Belle II experiment
• Response of a Li-glass/multi-anode photomultiplier detector to $\alpha$-particles from ${}^{241}$Am
• Response of a Li-glass/multi-anode photomultiplier detector to collimated thermal-neutron beams
• Response of a Li-glass/multi-anode photomultiplier detector to focused proton and deuteron beams
• Detectors for particle identification
• Particle Identification at Belle II