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Chapter 1


The TRT is one of the sub-detectors of ATLAS, a future particle detector which is going to be built at CERN, the European Laboratory for Nuclear Research. This sub-detector will be a cylinder of a length of seven meters and of a diameter of approximately two meters. It will contain about 420,000 detecting elements, which produce a data stream of up to 19 Tbit per second.

The huge amount of data and the large size of the TRT demand a circumspect design with respect to signal integrity and noise performance. The information gathered inside the detector has to be transmitted reliably to the outside. In addition, the sub-detector and its services should not interfere with other parts of the detector in terms of disturbing or being disturbed.

Up to now, signal integrity and electromagnetic compatibility were well known in high-energy physics, but somehow neglected until problems appeared. This is not any more acceptable for a complex design like ATLAS. Thus it is necessary to include these design concepts as soon as possible.

This thesis will discuss possible problematic areas which were found by simulation, measurements, and redesign, and it will point out how to implement them in the special environment of the TRT detector.

1.1 Environment

1.2 Transition-Radiation Tracker

1.3 Signal Integrity

1.4 Electromagnetic Compatibility

1.5 Constraints

February 9, 2000 - Martin Mandl
Copyright © CERN 2000