Physics – Instrumentation and Detectors
Scientific paper
2009-05-25
Nucl. Instrum. and Meth. A (2010)
Physics
Instrumentation and Detectors
3 pages. Part of the proceedings of the TIPP09 conference, held at Tsukuba, Japan. Updated the figures in v.2 to reflect the v
Scientific paper
10.1016/j.nima.2010.02.176
The ATLAS Pixel detector is a high-resolution, low-noise silicon-based device designed to provide tracking and vertexing information within a distance of 12 cm from the LHC beam axis. It consists of approximately 80 million pixel channels with radiation-hard front-end electronics connected through optical fibers to a custom-controlled DAQ system away from the detector. Following the successful installation of the detector in June 2007, an intense commissioning period was conducted in the year 2008 and more than 400,000 cosmic-ray tracks were recorded in conjunction with other ATLAS sub-detectors. By the end of the year, 96% of the detector was tuned, calibrated, and taking data at 99.8% tracking hit efficiency and with noise occupancy at the 10^-10 level. We present here the results of the commissioning, calibration, and data-taking as well as the outlook for future performance with LHC collision-based data.
Biesiada J.
for the ATLAS Collaboration
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