Studies of Scintillator Tiles with SiPM Readout for Imaging Calorimeters

TL;DR

This paper explores the development and testing of small scintillator tiles with SiPM readout for use in high-granularity imaging calorimeters, including fiberless coupling techniques and performance evaluations.

Contribution

It introduces a second-generation prototype with new geometries and fiberless coupling methods, advancing scintillator tile design for future collider detectors.

Findings

Successful fabrication of 3 mm thick tiles with embedded fibers

Demonstrated fiberless coupling with high response uniformity

Test results show promising performance for calorimeter applications

Abstract

Imaging hadronic calorimeters with scintillator readout use small scintillator tiles individually read out by silicon photomultipliers to achieve the necessary granularity needed for sophisticated reconstruction algorithms at future collider detectors. For a second generation prototype of the CALICE analog HCAL new, 3 mm thick scintillator tiles with an embedded wavelength shifting fiber and new photon sensor from CPTA are being fabricated. The availability of blue-sensitive SiPMs also allows fiberless coupling of the photon sensor to the tile, a technique requiring modified geometries to achieve a high degree of response uniformity. We discuss results from test bench and from test beam measurements of different scintillator tile geometries as well as prospects for fiberless coupling of photon sensors.