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\textbf{\small Production and Tests of the Precision Drift Tube Chambers for
the ATLAS Muon Spectrometer}{\small \par}

{\small Monitored Drift Tube (MDT) chambers of the ATLAS Muon Spectrometer consist
of three or four layers of pressurized drift tubes on either side of the spacer
frame which carries an optical monitoring system for measuring deformations.
This talk reports about the serial production of one of the largest chamber
types. One of the requirements for achieving the muon track resolution of 40
\( \mu  \)m is to have the signal wires positioned within the tubes with a
20 \( \mu  \)m accuracy. These wire positions have been measured in four MDT-chambers
with an X-ray scanning device at CERN. In addition, the dependence of the wire
coordinates and chamber deformations on the temperature gradients is presented.}{\small \par}

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