Test in a beam of large-area Micromegas chambers for sampling calorimetry

TL;DR

This paper evaluates large-area Micromegas chambers for sampling calorimetry, focusing on their uniformity, linearity, noise, and stability through beam tests, aiming to inform future collider detector designs.

Contribution

It presents the development and testing of three large-area Micromegas prototypes for calorimetry, demonstrating their suitability for high-energy physics experiments.

Findings

Prototypes achieved uniform and linear response.

Demonstrated stability against high ionisation deposits.

Measured performance supports future collider applications.

Abstract

Application of Micromegas for sampling calorimetry puts specific constraints on the design and performance of this gaseous detector. In particular, uniform and linear response, low noise and stability against high ionisation density deposits are prerequisites to achieving good energy resolution. A Micromegas-based hadronic calorimeter was proposed for an application at a future linear collider experiment and three technologically advanced prototypes of 1$\times$1 m$^{2}$ were constructed. Their merits relative to the above-mentioned criteria are discussed on the basis of measurements performed at the CERN SPS test-beam facility.