In-beam Tests of a Ring Imaging Cerenkov Detector With a Multianode Photomultiplier Readout

TL;DR

This paper reports on in-beam tests of a ring imaging Cherenkov detector with a multianode photomultiplier, demonstrating effective particle identification and a resolution of 2.3% in ring radius measurements.

Contribution

It presents successful operation and testing of a ring imaging Cherenkov detector with a multianode PMT in a beam environment, including performance metrics across various gases and particle types.

Findings

Achieved a ring radius resolution of 2.3%.

Successfully distinguished electrons, muons, pions, and kaons.

Operated effectively with multiple radiator gases.

Abstract

A ring-imaging \v{C}erenkov counter read out by a 100-channel PMT of active area 10$\times$10 cm$^2$ was operated successfully in a test beam at the BNL AGS with several radiator gases, including the heavy fluorocarbon C$_4$F$_{10}$. Ring radii were measured for electrons, muons, pions and kaons over the particle momentum range from 2 to 12 GeV/$c$, and a best resolution of $\sigma_r/r = 2.3\%$ was obtained.