Test of the first BIL tracking chamber for the ATLAS muon spectrometer

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 523; no. 3; pp. 309 - 322
• Main Authors: Avolio, G., Bagnaia, P., Baroncelli, A., Beretta, M., Bini, C., Branchini, P., Cirilli, M., Iodice, M., Lanza, A., La Rotonda, L., Meoni, E., Orestano, D., Pasqualucci, E., Petrucci, F., Pontecorvo, L.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 11.05.2004
• Subjects: ATLAS muon spectrometer; Drift chamber; ATLAS muon spectrometer; 29.40.Cs; Drift chamber
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/j.nima.2003.11.425

The first Barrel Inner Large chamber of the Monitored Drift Tube (MDT) tracking detector for the muon spectrometer of the ATLAS experiment has been tested with a high-energy muon beam. After a description of the MDT characteristics, we present the test beam experimental set-up, the data analysis techniques and discuss the results. The chamber was operated with a Ar(93%)–CO 2(7%) gas mixture at 3-bar pressure. The performance studies include the chamber calibration, the single-tube resolution, efficiency and electronic noise, and their behaviour as a function of the high-voltage setting and discriminator threshold.