Photoelectron Yields of Scintillation Counters with Embedded Wavelength-Shifting Fibers Read Out With Silicon Photomultipliers

TL;DR

This study measures photoelectron yields and timing performance of scintillation counters with embedded wavelength-shifting fibers and silicon photomultipliers, optimizing detector design for high-energy physics experiments.

Contribution

It provides detailed measurements of photoelectron yields across various configurations, advancing the understanding of detector performance with embedded fibers and SiPM readout.

Findings

Photoelectron yields depend on fiber diameter and coating.

Timing performance varies with scintillator composition.

Optimized configurations improve detector efficiency.

Abstract

Photoelectron yields of extruded scintillation counters with titanium dioxide coating and embedded wavelength shifting fibers read out by silicon photomultipliers have been measured at the Fermilab Test Beam Facility using 120\,GeV protons. The yields were measured as a function of transverse, longitudinal, and angular positions for a variety of scintillator compositions and reflective coating mixtures, fiber diameters, and photosensor sizes. Timing performance was also studied. These studies were carried out by the Cosmic Ray Veto Group of the Mu2e collaboration as part of their R\&D program.