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 8×10151MeVneqcm−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.
@article{arxiv.2201.12130,
title = {Spatial resolution and efficiency of prototype sensors for the LHCb VELO Upgrade},
author = {E. Buchanan and K. Akiba and M. van Beuzekom and P. Collins and E. Dall'Occo and T. Evans and V. Franco Lima and R. Geertsema and P. Kopciewicz and E. Price and B. Rachwal and S. Richards and D. Saunders and H. Schindler and T. Szumlak and P. Tsopelas and J. Velthuis and M. R. J. Williams},
journal= {arXiv preprint arXiv:2201.12130},
year = {2022}
}