The LHCb VELO Upgrade Module Construction
Abstract
The LHCb detector has undergone a major upgrade for LHC Run 3. This Upgrade I detector facilitates operation at higher luminosity and utilises full-detector information at the LHC collision rate, critically including the use of vertex information. A new vertex locator system, the VELO Upgrade, has been constructed. The core element of the new VELO are the double-sided pixelated hybrid silicon detector modules which operate in vacuum close to the LHC beam in a high radiation environment. The construction and quality assurance tests of these modules are described in this paper. The modules incorporate 200 \mum thick, n-on-p silicon sensors bump-bonded to 130 \nm technology ASICs. These are attached with high precision to a silicon microchannel substrate that uses evaporative CO cooling. The ASICs are controlled and read out with flexible printed circuits that are glued to the substrate and wire-bonded to the chips. The mechanical support of the module is given by a carbon fibre plate, two carbon fibre rods and an aluminium plate. The sensor attachment was achieved with an average precision of 21 , more than 99.5\% of all pixels are fully functional, and a thermal figure of merit of 3 \mathrm{Kcm^{2}W^{-1}}$ was achieved. The production of the modules was successfully completed in 2021, with the final assembly and installation completed in time for data taking in 2022.
Cite
@article{arxiv.2404.13615,
title = {The LHCb VELO Upgrade Module Construction},
author = {K. Akiba and M. Alexander and C. Bertella and A. Biolchini and A. Bitadze and G. Bogdanova and S. Borghi and T. J. V. Bowcock and K. Bridges and M. Brock and A. T. Burke and J. Buytaert and W. Byczynski and J. Carroll and V. Coco and P. Collins and A. Davis and O. De Aguiar Francisco and K. De Bruyn and S. De Capua and K. De Roo and F. Doherty and L. Douglas and L. Dufour and R. Dumps and D. Dutta and L. Eklund and A. Elvin and S. Farry and A. Fernandez Prieto and V. Franco Lima and J. Freestone and C. Fuzipeg and M. D. Galati and A. Gallas Torreira and R. E. Geertsema and E. Gersabeck and M. Gersabeck and F. Grant and T. Halewood-leagas and K. Hennessy and W. Hulsbergen and D. Hutchcroft and D. Hynds and E. Jans and D. John and M. John and N. Jurik and T. Ketel and S. Klaver and P. Kopciewicz and I. Kostiuk and M. Kraan and M. Langstaff and T. Latham and A. Leflat and E. Lemos Cid and V. Lukashenko and M. Merk and M. Milovanovic and M. Monk and D. Murray and I. Nasteva and A. Oblakowska-Mucha and T. Pajero and C. Parkes and A. Pazos Alvarez and E. Perez Trigo and M. Perry and F. Reiss and K. Rinnert and E. Rodriguez Rodriguez and J. Rovekamp and F. Sanders and L. G. Scantlebury Smead and M. Schiller and T. Shears and N. A. Smith and A. Snoch and P. Svihra and T. Szumlak and M. van Beuzekom and M. van Overbeek and P. Vazquez Regueiro and V. Volkov and M. Wormald and G. Zunica},
journal= {arXiv preprint arXiv:2404.13615},
year = {2024}
}