16 research outputs found

    ATLAS detector and physics performance: Technical Design Report, 1

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    Protvino drift tubes for BML-98. Test results

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    Measurement of torque applied to the end plug central brass pin due to gas jumper

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    Results of torque induced by gas jumper connecting pair of end plugs are presented. The measurements were performed for the "sperical" and original Pavia gas jumper with flat sitting. Influence of e nd plug displacemnts was tested

    Measurement of proportional counter gas gain

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    A method of evaluation of proportional counter gas gain from arbitrary current measurements has been developed. It provides absolute value of the gain in range from 1 to 10**8 with moderate current sensitivity and without knowledge of used radioactive source properties. As an example we present dependence of the gain versus voltage for drift lubes of ATLAS Muon Spectrometer filled with mixtures Ar-CO//2(93-7) and Ar-N//2-CH//4(91-4-5) at 3 bar absolute pressure. Results are compared with the gain obtained from ADC measurements. 7 Refs

    Development of drift tubes for the ATLAS muon spectrometer

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    We have designed a drift tube for the muon spectrometer of the ATLAS experiment at the LHC collider. Here we present detail design of the tube, particularly its end plug with possibility to locate wire with respect to outer reference surface with precision +or-10 mu m (RMS in both directions). Some test results and tubes performances are given also. (7 refs)

    ATLAS monitored drift tube assembly and test at IHEP (Protvino)

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    The Monitored Drift Tube is the basic element of the muon spectrometer of ATLAS detector at LHC. More than 14000 such tubes have been assembled and tested at IHEP (Protvino) in framework of construction of end-cap drift chambers for the spectrometer. This paper reports some details of assembling techniques and quality control and assurance test results
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