Optimization of light yield by injection of the optical filler into the co extruded hole of plastic scintillation bar with WLS fiber in it

TL;DR

This study demonstrates that injecting optical filler into the co-extruded hole of a plastic scintillation bar with WLS fiber significantly enhances light yield, improving collection efficiency by up to 1.9 times based on cosmic muon measurements.

Contribution

It introduces a novel technique of injecting optical filler into the scintillation bar's hole to boost light collection efficiency, which was not previously explored.

Findings

Light yield increased by a factor of 1.6 to 1.9 with optical filler.

Injection of optical filler significantly improves light collection efficiency.

Method tested with cosmic muons on 2-meter scintillation bars.

Abstract

Results of the measurements with cosmic muons for the light yield of 2-meter long extruded scintillation bar (strip) as a function of distance for different options for light collection technique are presented. Scintillation strip cross section geometry was a triangle made on polystyrene plastic scintillator with dopants of 2% PTP and 0.03% POPOP, extruded with 2.6 mm diameter hole and produced at ISMA (Kharkov, Ukraine). It was shown that the insertion of the optical transparent resin (BC 600 or CKTN MED(E)) by special technique into the co-extruded hole with 1.0 mm or 1.2 mm wave-length shifter (WLS) fiber Kuraray Y11 (200) MC in it significantly improves light collection by factor of 1.6...1.9 against of the 'dry' case.