Position resolution and efficiency measurements with large scale Thin Gap Chambers for the super LHC

TL;DR

This paper reports on the development and testing of large-scale Thin Gap Chambers (TGC) for the super LHC, demonstrating high radiation tolerance, precise muon tracking, and high detection efficiency under intense radiation and particle flux.

Contribution

It introduces modified large-scale TGC prototypes capable of withstanding high irradiation doses while maintaining high spatial resolution and detection efficiency for super LHC conditions.

Findings

Single gap resolution better than 60 microns at perpendicular incidence

Resolution of less than 100 microns at 20-degree incidence angle

High efficiency maintained under neutron flux of 10^5 Hz/cm^2

Abstract

New developments in Thin Gap Chambers (TGC) detectors to provide fast trigger and high precision muon tracking under sLHC conditions are presented. The modified detectors are shown to stand a high total irradiation dose equivalent to 6 Coulomb/cm of wire, without showing any deterioration in their performance. Two large (1.2 x 0.8 m^2) prototypes containing four gaps, each gap providing pad, strips and wires readout, with a total thickness of 50 mm, have been constructed. Their local spatial resolution has been measured in a 100 GeV/c muon test beam at CERN. At perpendicular incidence angle, single gap position resolution better than 60 microns has been obtained. For incidence angle of 20 degrees resolution of less than 100 micron was achieved. TGC prototypes were also tested under a flux of 10^5 Hz/cm^2 of 5.5-6.5 MeV neutrons, showing a high efficiency for cosmic muons detection.