Abstract
An overview of the ATLAS and CMS silicon trackers is presented. The silicon tracker is a key element for the discovery potential of the ATLAS and CMS detectors at LHC. The performances of the two systems, which are designed to operate with a 40 MHz bunch crossing frequency in a high particle flux density and hard radiation environment, are discussed.
Highlights
Physics at the LHC put severe requirements on tracking detectors, due to the high interaction rate, particle density and received radiation dose
At high-luminosity (1034 cm−2s−1), on average 20 minimum bias events are produced per bunch crossing, which will produce more than 1000 tracks in the tracker acceptance, leading to very high detector occupancy
Inner detectors are required to survive a harsh radiation environment with particle fluxes of between 1013 and 1014 equivalent 1 MeV neutrons/cm2/year and they are designed in order to continue working for at least ten years
Summary
Physics at the LHC put severe requirements on tracking detectors, due to the high interaction rate, particle density and received radiation dose. Inner detectors are required to survive a harsh radiation environment with particle fluxes of between 1013 and 1014 equivalent 1 MeV neutrons/cm2/year and they are designed in order to continue working for at least ten years. The tracker has to be able to resolve and measure precisely all tracks, in order to identify those belonging to interesting interactions. The ATLAS tracking system is based on three different technologies: pixel detectors, silicon strips and a straw-tube tracker with transition radiation detection capability (TRT), while the CMS tracking system features an all-silicon layout consisting of a pixel detector and a silicon-microstrip tracker
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