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The Transition Radiation Detector (TRD) performs electron identification and triggering on electrons and jets, providing a trigger decision in about 7 microseconds.
TRD is composed of 522 detectors, arranged in 18 sectors in azimuth, each of 5 stacks in longitudinal direction, with 6 layers per stack. The diameter of the TRD cylinder is about 7 m and the length 7 m. It has 1.15 million channels of readout, each sampling the signal in 20 time bins. The active gas is a xenon-CO2 mixture.
Details of the working principle of TRD is in the link here.
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TRD Documents
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TRD Internal: |
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