Test of Lightguides for the J-PET Detector

TL;DR

This study evaluates various lightguide configurations in the J-PET detector to optimize light collection and timing without degrading performance, providing insights into their impact on detector resolution.

Contribution

It systematically tests different lightguide designs and connection methods, identifying optimal configurations for the J-PET detection system.

Findings

Lightguide insertion does not impair time resolution.

Correlation between light output and time resolution confirmed.

Optimal lightguide shapes and connection methods identified.

Abstract

The aim of this work was to test the impact of the lightguides insertion in the J-PET detection system and to choose the best of available solutions. At the two strip J-PET test system a series of measurements was performed with different combinations concerning the length of the lightguides (3 mm and 3 cm) and scintillators (3, 15 and 30 cm), shape of lightguides (trapezoidal and cylindrical, with and without a cut matching the scintillator size) and optical connection between elements (optical gel and glue). It was proven that the insertion of the thin lightguide does not spoil the time resolution and the light output. Additionally,the correlation between the time resolution and the light output was confirmed.