Study of cluster shapes in the Mimosa-5 pixel detector

TL;DR

This paper investigates the shape and characteristics of pixel clusters in the Mimosa-5 detector caused by beamstrahlung background particles at various incident angles, relevant for future collider detectors.

Contribution

It provides detailed analysis of cluster elongation and shape variations in the Mimosa-5 pixel detector due to beamstrahlung electrons at different angles.

Findings

Clusters become more elongated at larger incident angles.

Cluster shape depends on the angle of particle impact.

Results inform detector design for future colliders.

Abstract

Beamstrahlung will constitute an important source of background in a pixel vertex detector at the future International Linear Collider. Electron and positron tracks of this origin impact the pixel planes at angles generally larger than those of secondary hadrons and the corresponding clusters are elongated. We report studies of cluster characteristics using test beam electron tracks incident at various angles at a Mimosa-5 pixel matrix.