Inner Shielding of the COMET Cosmic Veto System

TL;DR

This paper presents a Geant4 simulation study of neutron shielding for the COMET cosmic veto system, optimizing shield design to minimize false veto signals caused by neutrons.

Contribution

It introduces a detailed simulation framework for neutron interaction with the shield and proposes an optimized multilayer shield design for the COMET system.

Findings

Optimized shield layer materials and thicknesses.

Effective reduction of neutron-induced fake veto signals.

Validated simulation approach for shielding design.

Abstract

A simulation of neutrons traversing a shield beneath the COMET scintillator strip cosmic-veto counter is accomplished using the Geant4 toolkit. A Geant4 application is written with an appropriate detector construction and a possible spectrum of neutron's energy. The response of scintillator strips to neutrons is studied in detail. A design of the shield is optimized to ensure the time loss concerned with fake veto signals caused by neutrons from muon captures is tolerable. Materials of shield layers are chosen, and optimum thicknesses of the layers are computed.