Speaker
Lorenzo Uplegger
(Fermi National Accelerator Lab. (Fermilab))
Description
At the SLHC, after 2500 pb-1 of data, the expected maximum fluence for the pixel region (<20 cm) will be 2.5E16 cm-2. To cope with this unprecedented radiation environment, there has been a worldwide effort to find possible solutions for vertex and tracking detectors at the SLHC. A variety of solutions have been pursued. These include diamond sensors, 3D sensors, MCZ planar silicon detectors made from MCZ wafers, epitaxial, p-type silicon wafers, and thin silicon detectors. Using the Fermilab Test Beam Facility (FTBF), we have carried out a number of beam tests to study these various sensors. The idea is to compare the performance of this wide variety of technologies in the test beam before and after irradiation. To do so, we use a CMS pixel-based telescope which has been built and installed at the FTBF to provide the reference beam tracks. Our program of studies include the charge collection efficiency of the irradiated and unirradiated devices, and the spatial resolution as a function of the track incident angle. We will present some of the preliminary results in this paper.
