Drift-time calibration of the ATLAS monitored drift tubes with a precision mini-chamber

Daniel S. Levin, Nir Amram, Meni Ben Moshe, Erez Etzion, Tiesheng Dai, Edward B. Diehl, Claudio Ferretti, Jeffery Gregory, Mike Kiesel, Rudi Thun, Curtis Weaverdyck, Alan Wilson, Bing Zhou

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Muon track reconstruction in the ATLAS Muon Precision (MDT) Chambers relies on many thousands of calibration parameters: T-zeros offsets and on time-to-space (RT) functions that convert drift time to drift radius. A data intensive computing program has been created to obtain compute these constants daily for each of thousands of muon-spectrometer subregions. For early LHC running a simplified calibration employing a single universal RT function (URT) provided by a dedicated gas-monitor MDT chamber can be invoked. Constructed with standard MDT's, the monitor chamber records cosmic ray drift-time spectra derived from gas flowing in the input and output arteries of the main ATLAS MDT gas supply. These spectra are used to compute the URT bi-hourly, referenced to a standard operating pressure and temperature.

Original languageEnglish
Title of host publication2008 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2008
Pages2266-2269
Number of pages4
DOIs
StatePublished - 2008
Event2008 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2008 - Dresden, Germany
Duration: 19 Oct 200825 Oct 2008

Publication series

NameIEEE Nuclear Science Symposium Conference Record
ISSN (Print)1095-7863

Conference

Conference2008 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2008
Country/TerritoryGermany
CityDresden
Period19/10/0825/10/08

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