Calibration and Performance of the ATLAS Muon Spectrometer

TL;DR

This paper discusses the calibration procedures and performance metrics of the ATLAS muon spectrometer, highlighting its resolution, precision, and monitoring systems crucial for accurate muon momentum measurements in high-energy physics experiments.

Contribution

It provides a detailed analysis of the calibration process and performance evaluation of the ATLAS muon spectrometer, including resolution and positional accuracy.

Findings

Muon momentum resolution of 4% at 100 GeV/c

Tracking resolution of 50 microns up to eta 2.7

Optical monitoring system achieves 40 micron detector position accuracy

Abstract

The ATLAS muon spectrometer is designed to measure muon momenta with a resolution of 4% @ 100 GeV/c rising to 10% @ 1 TeV/c track momentum. The spectrometer consists of precision tracking and trigger chambers embedded in a 2T magnetic field generated by three large air-core superconducting toroids. The precision detectors provide 50 micron tracking resolution to a pseudo-rapidity of 2.7. The system also includes an optical monitoring system which measures detector positions with 40 micron precision. This paper reports on the calibration and performance of the ATLAS muon spectrometer.