For scintillator tiles read out by silicon photomultipliers, adding reflective film makes the muon light yield temperature-dependent, with roughly 10 percent lower response at -30 C than at +30 C.
Uniformity Studies of Scintillator Tiles directly coupled to SiPMs for Imaging Calorimetry
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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.
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Response to cosmic muons of scintillator-SiPM assemblies measured at different temperatures
For scintillator tiles read out by silicon photomultipliers, adding reflective film makes the muon light yield temperature-dependent, with roughly 10 percent lower response at -30 C than at +30 C.