Spatial resolution and efficiency of prototype sensors for the LHCb VELO Upgrade. (1st June 2022)

• Record Type: Journal Article
• Authors: Buchanan, E.; Akiba, K.; van Beuzekom, M.; Collins, P.; Dall'Occo, E.; Evans, T.; Franco Lima, V.; Geertsema, R.; Kopciewicz, P.; Price, E.; Rachwal, B.; Richards, S.; Saunders, D.; Schindler, H.; Szumlak, T.; Tsopelas, P.; Velthuis, J.; Williams, M.R.J.
• Is Part Of: Journal of instrumentation. Volume 17:Number 6(2022)
• Publication Date: 2022-06-01
• Subjects: Hybrid detectors -- Particle tracking detectors (Solid-state detectors) -- Radiation-hard detectors -- Solid state detectors; Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/17/06/P06038
• Languages: English
• ISSNs: 1748-0221

Abstract

Abstract: 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.