16 research outputs found

    ATLAS detector and physics performance: Technical Design Report, 1

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    ATLAS muon precision chamber construction at the University of Thessaloniki

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    ATLAS is one of the two general purpose experiments being built for the LHC at CERN. Its Muon Spectrometer consists of high precision chambers made of drift tubes (MDTs = Monitored Drift Tubes). The properties and the performance of the chambers is described. Highlights of the construction and the quality control of the first chamber of type BIS to be used in ATLAS are presented. 7 Refs

    The Micromegas Project for the ATLAS New Small Wheel

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    The MicroMegas technology was selected by the ATLAS experiment at CERN to be adopted for the Small Wheel upgrade of the Muon Spectrometer, dedicated to precision tracking, in order to meet the requirements of the upcoming luminosity upgrade of the Large Hadron Collider. A large surface of the forward regions of the Muon Spectrometer will be equipped with 8 layers of MicroMegas modules forming a total active area of 1200 m2. The New Small Wheel is scheduled to be installed in the forward region of 1.3 < |η| < 2.7 of the ATLAS detector during the second long shutdown of the Large Hadron Collider. The New Small Wheel will have to operate in a high background radiation environment, while reconstructing muon tracks as well as furnishing information for the Level-1 trigger. The project requires fully efficient MicroMegas chambers with spatial resolution down to 100 µm, a rate capability up to about 15 kHz/cm2 and operation in a moderate (highly inhomogeneous) magnetic field up to B=0.3 T. The required tracking is linked to the intrinsic spatial resolution in combination with the demanding mechanical accuracy. An overview of the design, construction and assembly procedures of the MicroMegas modules will be reported.The MicroMegas technology was selected by the ATLAS experiment at CERN to be adopted for the Small Wheel upgrade of the Muon Spectrometer, dedicated to precision tracking, in order to meet the requirements of the upcoming luminosity upgrade of the Large Hadron Collider. A large surface of the forward regions of the Muon Spectrometer will be equipped with 8 layers of MicroMegas modules forming a total active area of 1200m21200\,m^{2}. The New Small Wheel is scheduled to be installed in the forward region of 1.3<η<2.71.3<\vert \eta \vert <2.7 of the ATLAS detector during the second long shutdown of the Large Hadron Collider. The New Small Wheel will have to operate in a high background radiation environment, while reconstructing muon tracks as well as furnishing information for the Level-1 trigger. The project requires fully efficient MicroMegas chambers with spatial resolution down to 100μm100\,{\mu}m, a rate capability up to about 15kHz/cm215\,kHz/cm^{2} and operation in a moderate (highly inhomogeneous) magnetic field up to B=0.3TB=0.3\,T. The required tracking is linked to the intrinsic spatial resolution in combination with the demanding mechanical accuracy. An overview of the design, construction and assembly procedures of the MicroMegas modules will be reported

    The first precision drift tube chambers for the ATLAS muon spectrometer

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    The muon spectrometer of the ATLAS detector for the Large Hadron Collider is designed to provide a muon transverse momentum resolution of 2%-10% for momenta between 6 GeV and 1 TeV over a pseudo-rapidity range of |η|≤2.7. This required the development of precision drift chambers with a track position resolution of 40 μm, the Monitored Drift Tube (MDT) chambers. We report about the construction of the three main types of MDT chambers for ATLAS, test results and the first production experience. © 2002 Elsevier Science B.V. All rights reserved

    The first precision drift tube chambers for the ATLAS muon spectrometer

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    The muon spectrometer of the ATLAS detector for the Large Hadron Collider is designed to provide a muon transverse momentum resolution of 2-10% for momenta between 6 GeV and 1 TeV over a pseudo-rapidity range of |eta |< 2.7. This required the development of precision drift chambers with a track position resolution of 40 micrometer, the Monitored Drift Tube (MDT) chambers. We report about the construction of the three main types of MDT chambers for ATLAS, test results and the first production experience

    ATLAS calorimeter performance

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    ATLAS computing technical proposal

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    ATLAS computing technical proposal

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