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T: Fachverband Teilchenphysik

T 89: Pixel Detectors IV

T 89.1: Vortrag

Donnerstag, 18. März 2021, 16:00–16:15, Tn

Spatial Hit Resolution of Planar Pixel Sensors for the CMS Phase 2 Upgrade — •Finn Feindt1, Aliakbar Ebrahimi3, Erika Garutti1, Mohammadtaghi Hajheidari1, Caroline Niemeyer1, Daniel Pitzl2, Georg Steinbrück1, Jörn Schwandt1, and Irene Zoi11Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Deutschland — 2Deutsches Elektronen-Synchrotron, Notkestraße 85, 22607 Hamburg, Deutschland — 3Paul Scherrer Institut, Forschungsstrasse 111, 5232 Villigen PSI, Schweiz

For the High Luminosity upgrade of the Large Hadron Collider (HL-LHC), the CMS Pixel Detector will be upgraded to withstand 1 MeV neutron equivalent fluences φeq of up to 2.3 × 1016 cm−2 at a distance of 2.8 cm from the beam, corresponding to an integrated luminosity of 3000 fb−1. It has to enable tracking and vertex finding in an environment of high track multiplicity with up to 200 proton-proton collisions per bunch crossing. Planar n+-p pixel sensors prototypes with pixel sizes of 50×50 µm2 or 25×100 µm2 and an active thickness of 150 µm were investigated and their spatial hit resolution was measured in the DESY II test beam. The investigated sensors were irradiated with protons or neutrons, to fluences up to φeq = 7 × 1015 cm−2. The spatial hit resolution is studied as a function of the track angle and charge pixel threshold. It is compared for different fluences φeq and sensors with different layouts of the pixel implants. The results of this study serve as input to the final decision on the layout of planar pixel sensors for the HL-LHC upgrade of CMS.

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DPG-Physik > DPG-Verhandlungen > 2021 > Dortmund