Commissioning of the highly granular SiW-ECAL technological prototype

TL;DR

This paper details the commissioning and initial beam test analysis of a highly granular silicon tungsten calorimeter prototype, demonstrating its sensitivity and stable performance in high magnetic fields, relevant for future collider detectors.

Contribution

It introduces a new highly granular SiW-ECAL prototype with performance comparable to future collider detector requirements, including operation in magnetic fields.

Findings

Capable of recording signals as low as 0.5 MIP

No performance loss in high magnetic fields

Prototype has channel density similar to future collider detectors

Abstract

In this article we describe the commissioning and a first analysis of the the beam test performance of a small prototype of a highly granular silicon tungsten calorimeter. The prototype features detector elements with a channel number similar to that envisaged for e.g. the ILD Detector of the International Linear Collider (ILC). The analysis demonstrates the capability of the detector to record signals as low as 0.5 MIP. Further, no loss of performance has been observed when operating the detector in a high magnetic field.