40 research outputs found

    Construction, assembly and tests of the ATLAS electromagnetic end-cap calorimeters

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    The construction and the assembly of the two end-caps of the ATLAS liquid argon electromagnetic calorimeter as well as their test and qualification programs are described. The work described here started at the beginning of 2001 and lasted for approximately three years. The results of the qualification tests performed before installation in the LHC ATLAS pit are given. The detectors are now installed in the ATLAS cavern, full of liquid argon and being commissioned. The complete detectors coverage is powered with high voltage and readout

    Construction, assembly and tests of the ATLAS electromagnetic barrel calorimeter

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    The construction and assembly of the two half barrels of the ATLAS central electromagnetic calorimeter and their insertion into the barrel cryostat are described. The results of the qualification tests of the calorimeter before installation in the LHC ATLAS pit are given

    Evaluation of Fermi Read-out of the ATLAS Tilecal Prototype

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    Prototypes of the \fermi{} system have been used to read out a prototype of the \atlas{} hadron calorimeter in a beam test at the CERN SPS. The \fermi{} read-out system, using a compressor and a 40 MHz sampling ADC, is compared to a standard charge integrating read-out by measuring the energy resolution of the calorimeter separately with the two systems on the same events. Signal processing techniques have been designed to optimize the treatment of \fermi{} data. The resulting energy resolution is better than the one obtained with the standard read-out

    Performance of the ATLAS Electromagnetic Calorimeter End-cap Module 0

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    The construction and beam test results of the ATLAS electromagnetic end-cap calorimeter pre-production module 0 are presented. The stochastic term of the energy resolution is between 10% GeV^1/2 and 12.5% GeV^1/2 over the full pseudorapidity range. Position and angular resolutions are found to be in agreement with simulation. A global constant term of 0.6% is obtained in the pseudorapidity range 2.5 < eta < 3.2 (inner wheel)

    Performance of the ATLAS electromagnetic calorimeter end-cap module 0

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    The construction and beam test results of the ATLAS electromagnetic end-cap calorimeter pre-production module 0 are presented. The stochastic term of the energy resolution is between 10% GeV^1/2 and 12.5% GeV^1/2 over the full pseudorapidity range. Position and angular resolutions are found to be in agreement with simulation. A global constant term of 0.6% is obtained in the pseudorapidity range 2.5 eta 3.2 (inner wheel)

    ATLAS detector and physics performance: Technical Design Report, 1

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    Description and Performances of the Electrical Test Benches for Readout Electrodes of the ATLAS EM Calorimeter

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    This note describes the different benches proposed by the LPNHE-Paris group to test the electrical properties of ATLAS Liquid Argon calorimeter electrodes. Two types of tests have been performed on electrode pre-prototypes since October 1997 to evaluate the benches performances. The first tests are done on flat electrodes, and the latter ones on the same electrodes after bending. At the production step, flat electrodes tests will be done in the factories and bent electrodes tests in the laboratories. Examples of results on benches performances (capacitances, resistances and leakage current measurements) are presented in this note
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