Physics
Scientific paper
Apr 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aps..aprc11002r&link_type=abstract
American Physical Society, April Meeting, April 28 - May 1, 2001 Washington, DC Bulletin of the American Physical Society, Vol.
Physics
Scientific paper
Silicon pixel detectors and readout chips for the CMS pixel were tested in a beam at CERN. A silicon telescope consisting of 8 planes of silicon strips gave the position of the 250 GeV/c pion beam with a σ = 7 μ m at the position of the pixel detector. The pixel sensors under test are located between the telescope planes. The information is read out with a custom made VME system. Data was taken with the beam at different angles of incidence relative to the pixel sensors that have a square shape and 150 μ m size. Using an analog readout of the signal and a magnetic field of up to 3T, a position resolutions between 10 and 20 μ m were observed with detectors before irradiation. These results satisfy the requirements set for the CMS detector but still need to be confirmed after irradiating the sensors. Participating institutions: U. of California Davis, FNAL, Johns Hopkins U., IHEP Vienna, U. of Mississippi, Northwestern U., Purdue U., PSI Zürich, Rutgers U., U. of Zürich.
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