Design criteria for multi-layered scintillating fibre arrays with inclined columns

TL;DR

This paper discusses the design of multi-layered scintillating fibre arrays with inclined columns, focusing on geometries, criteria, and effects of diverging particles using Monte Carlo simulations.

Contribution

It introduces design criteria for inclined fibre array geometries and analyzes the impact of diverging particles through simulations.

Findings

Optimal fibre packing geometries identified

Inclined columns improve detection for large incident angles

Simulation results guide detector design choices

Abstract

Multi-layered scintillating fibre arrays read-out are commonly used as high resolution charged particle hodoscopes. Fibres of a column along the geometrical trajectory of incident particles are typically grouped to one pixel of a multi-channel read-out device. In some applications the incident particles will cross the detection plane with large angles w.r.t. the normal to the layers. Then, the packing of the fibres needs to be adapted to the incident particles and the columns need to be inclined. In this paper possible fibre array geometries are shown, relevant design criteria for detectors are discussed, and the effect of diverging particles incident on fibre arrays was studied using a Monte Carlo simulation.