Uniformity Studies of Scintillator Tiles directly coupled to SiPMs for Imaging Calorimetry

TL;DR

This paper introduces a new scintillator tile design with fiberless SiPM coupling, achieving high response uniformity for use in granular calorimeters, supported by detailed electron response measurements.

Contribution

A novel scintillator tile geometry with drilled slit coupling to SiPMs that enhances uniformity in calorimeter applications.

Findings

High uniformity of response across the tile area.

Effective coupling achieved without fibers.

Detailed electron response characterization.

Abstract

We present a novel geometry of scintillator tiles developed for fiberless coupling to silicon photomultipliers (SiPMs) for applications in highly granular calorimeters. A high degree of uniformity of the tile response over the full active area was achieved by a drilled slit at the coupling position of the photon sensor with 2 mm, 4 mm and 5.5 mm in height, width and depth. Detailed measurements of the response to penetrating electrons were performed for tiles with a lateral size of 3 x 3 cm^2 and thicknesses of 5 mm and 3 mm.