Spatial resolution and efficiency of prototype sensors for the LHCb VELO Upgrade

Emma Buchanan, Kazu Akiba, Martin van Beuzekom, Paula Collins, Elena Dall'Occo, Tim Evans, Vincente Franco Lima, Rolf Geertesema, P. Kopciewicz, B. Rachwal, Sophie E Richards, Daniel Saunders, Heinrich Schindler, Tomasz Szumlak, Panos Tsopelas, Jaap J Velthuis, Mark Williams

Research output: Contribution to journalArticle (Academic Journal)peer-review

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A comprehensive study of the spatial resolution and detection efficiency of sensor prototypes developed for the LHCb VELO upgrade is presented. Data samples were collected at the CERN SPS H8 beam line using a hadron mixture of protons and pions with momenta of approximately 180 GeV/c. The sensor performance was characterised using both irradiated and non-irradiated sensors. Irradiated samples were subjected to a maximum fluence of 8×10^{15} 1 MeV neq cm^{-2}, of both protons and neutrons. The spatial resolution is measured comparing the detected hits to the position as predicted by tracks reconstructed by the Timepix3 telescope. The resolution is presented for different applied bias voltages and track angles, sensor thickness and implant size.
Original languageEnglish
Article numberP06038
Number of pages17
JournalJournal of Instrumentation
Issue number6
Publication statusPublished - 29 Jun 2022

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