Novel photon detectors for RICH applications

Abstract

The paper describes recent developments in Photon Detectors useful for the Cherenkov Ring Imaging Applications (RICH). We discuss the Multi-anode PMTs, HPDs with PIN and APD diode readout, APDs working in a Geiger mode, and the gaseous multi-pattern detectors. The paper emphasizes their timing properties. We give equal chance to fragile, not yet entirely proven ideas.

Multianode photomultiplier tube studies for imaging applications

“…Relative detection efficiencies were calculated from charge spectra as before, whereas timing spectra were fitted with the sum of two Gaussians and a quadratic background of the form G 1 þG 2 þ a þ bx þ cx 2 [6]. Examples of timing spectra acquired at single and 20 photoelectron light levels are shown in Fig.…”