Tests of Scintillator Tiles for the Technological Prototype of Highly Granular Hadron Calorimeter

Abstract

A new technological prototype of the highly granular hadron calorimeter for future collider experiments is being developed by the CALICE collaboration. The proposed baseline design of active elements considers scintillator tiles with a silicon photomultiplier readout. The light yield and uniformity of response of two tiles with dimple geometry from different producers were measured. The technology proposed for the ILD detector was used: each tile was individually wrapped in the reflecting foil and the SiPm was coupled directly to the dimple side of the scintillator tile. The measured response to minimum ionizing particle is almost twice better for BICRON408 scintillator than for polystyrene-based scintillator, while the estimated uniformity of response is better for the polystyrene-based scintillator tile produced by injection molding.

Effects of misalignment on response uniformity of SiPM-on-tile technology for highly granular calorimeters

“…Hexagonal and rhomboidal tiles also are in general well adjusted to detector designs with hexagonal electronics boards as central elements defining the geometry. The scintillator tiles used in the present study include the polystyrene-based injectionmolded scintillator2 tile used in the CALICE AHCAL technological prototype with a size of 30 × 30 mm 2 [9], square tiles machined from Bicron BC-408 scintillator3 with sizes of 20 × 20 mm 2 , 30 × 30 mm 2 and 40 × 40 mm 2 , and two different hexagonal scintillator tiles and one rhomboidal tile machined from BC-408. Since the polystyrene-based tiles were taken from the mass production for the CALICE AHCAL technological prototype, only one size was available, as defined by the production mold.…”

Studies of time resolution, light yield, and crosstalk using SiPM-on-tile calorimetry for the future Electron-Ion Collider

“…Further studies can be done to optimize the light yield and uniformity, for instance by repeating these and other studies with various dimple geometries, as guided by earlier optimization studies such as [1,2,2,9,26,[39][40][41][42][43]. More efficient SiPMs, such as those that use epitaxial-quenching resistors [44,45] may further improve light yield as demonstrated in ref.…”