TRTViewer: Monitoring and Diagnostic Tool for the TRT Detector of the ATLAS Experiment at LHC

TRTViewer is the dedicated software tool for monitoring of the ATLAS Transition Radiation Tracker (TRT) performance at dif- ferent electronics levels: individual channels, readout chips or electronic boards. It can use several sources of input information – from direct DAQ stream or raw data files to ROOT files with processed analysis histograms. Using TRTViewer one can quickly estimate the TRT operational parameters – occupancy, efficiency, timing, reveal problematic regions with noisy, dead or inefficient channels, check calibration uniformity, etc. This tool is widely used by shifters in ATLAS Control Room and also by TRT experts during electronics installation, tuning, operation control and express-offline data analysis.