Operation of a LAr-TPC equipped with a multilayer LEM charge readout

TL;DR

This paper presents a new LAr-TPC detector using a multilayer LEM for charge readout, demonstrating effective 3D event reconstruction and high signal collection efficiency in liquid Argon.

Contribution

Introduction of a multilayer LEM-based charge readout for LAr-TPCs, enabling improved 3D reconstruction and signal collection.

Findings

Successful detection of cosmic muon tracks

Achieved about 90% ionization signal collection

Demonstrated comparable signal-to-noise ratio to traditional wire chambers

Abstract

A novel detector for the ionization signal in a single phase LAr-TPC, based on the adoption of a multilayer Large Electron Multiplier (LEM) replacing the traditional anodic wire arrays, has been experimented in the ICARINO test facility at the INFN Laboratories in Legnaro. Cosmic muon tracks were detected allowing the measurement of energy deposition and a first determination of the signal to noise ratio. The analysis of the recorded events demonstrated the 3D reconstruction capability of ionizing events in this device in liquid Argon, collecting a fraction of about 90% of the ionization signal with signal to noise ratio similar to that measured with more traditional wire chambers