Instruments for Detecting Electric Breakdowns in Proportional Drift Chambers of the Transition Radiation Tracker in the ATLAS Experiment

摘要

The transition radiation tracker is a part of the ATLAS facility at the LHC accelerator at CERN and operates as a position detector and a detector of transient radiation. It consists of approximately 400000 proportional drift chambers (PDCs) filled with a mixture of Xe + CO_2 + O_2. During its operation, electric breakdowns may occur, which may result in a failure of the detecting element. To diagnose and find broken-down PDCs, an instrument has been developed that makes it possible, by analyzing signals from the anode, to detect defective PDCs and exclude them from the working detector.