Streamlined calibrations of the ATLAS precision muon chambers for initial LHC running

Authors :: Amram, N.
Ball, R.
Benhammou, Y.
Ben Moshe, M.
Dai, T.
Diehl, E.B.
Dubbert, J.
Etzion, E.
Ferretti, C.
Gregory, J.
Haider, S.
Hindes, J.
Levin, D.S.
Manilow, E.
Thun, R.
Wilson, A.
Weaverdyck, C.
Wu, Y.
Yang, H.
Zhou, B.
Source :: Nuclear Instruments & Methods in Physics Research Section A. Apr2012, Vol. 671, p40-50. 11p.
Publication Year :: 2012
Abstract: Abstract: The ATLAS Muon Spectrometer is designed to measure the momentum of muons with a resolution of dp/p=3% at 100GeV and 10% at 1TeV. For this task, the spectrometer employs 355,000 Monitored Drift Tubes (MDTs) arrayed in 1200 chambers. Calibration (RT) functions convert drift time measurements into tube-centered impact parameters for track segment reconstruction. RT functions depend on MDT environmental parameters and so must be appropriately calibrated for local chamber conditions. We report on the creation and application of a gas monitor system based calibration program for muon track reconstruction in the LHC startup phase. [Copyright &y& Elsevier]

Subjects :: *LARGE Hadron Collider
*CALIBRATION
*OPTICAL resolution
*MOMENTUM (Mechanics)
*DRIFT chambers
MUON spectra

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