Title :
A gas monitor for the ATLAS Muon Spectrometer precision chambers
Author :
Levin, Daniel S. ; Amram, Nir ; Ben Moshe, Meny ; Benhammou, Yan ; Dai, Tiesheng ; Diehl, Edward B. ; Etzion, Erez ; Ferretti, Claudio ; Gregory, Jeffery ; Kiesel, M. ; Thun, Rudi ; Weaverdyck, Curtis ; Wilson, Alan ; Zhou, Bing
Author_Institution :
Univ. of Michigan, Ann Arbor
fDate :
Oct. 26 2007-Nov. 3 2007
Abstract :
The ATLAS Muon Spectrometer incorporates some 354,000 drift tubes assembled into 1200 monitored drift tube (MDT) precision chambers, with a total gas volume of 723,000 dm3. A gas mixture of 93% Ar and 7% CO2 at 3 bar flows in a parallel feed at a rate of one chamber volume per day. Achieving the 80 mum single drift tube design resolution requires stringent gas quality control. We report on the design and initial performance of a dedicated MDT mini-chamber conceived for continuous monitoring of the ATLAS Muon Spectrometer MDT system operating gas. This chamber enables measurement of the drift spectra from which gas properties relevent to MDT calibrations are determined.
Keywords :
calibration; drift chambers; particle spectrometers; ATLAS muon spectrometer; Ar; CO2; MDT calibrations; MDT minichamber; drift spectra; gas mixture; gas monitor; gas quality control; monitored drift tube precision chambers; Anodes; Argon; Calibration; Electrons; Magnetic field measurement; Mesons; Monitoring; Spatial resolution; Spectroscopy; Wire;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2007. NSS '07. IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-0922-8
Electronic_ISBN :
1095-7863
DOI :
10.1109/NSSMIC.2007.4436396
