Radiation damage effects and operation of the LHCb vertex locator

Akiba, K. et al. (2018) Radiation damage effects and operation of the LHCb vertex locator. IEEE Transactions on Nuclear Science, 65(5), pp. 1127-1132. (doi: 10.1109/TNS.2018.2824618)

Abstract

Vertex locator (VELO) is a silicon microstrip detector situated around the interaction point in the large Hadron Collider beauty (LHCb) spectrometer at the Large Hadron Collider. The LHCb experiment is dedicated to studying charge conjugation and parity symmetry violation in the heavy flavor sector and rare decays of B mesons. The precise reconstruction of both the primary and secondary vertices, obtained by the VELO, is crucial in the selection of signal events containing b and c quarks and lifetime measurements. VELO consists of two retractable parts that operate at 8 mm from the interaction region. Its proximity to proton beams makes the LHCb VELO a place for studying radiation damage effects in silicon detectors in proton–proton and heavy-ion collisions. The latest results from radiation damage studies and their impact on the operation of the LHCb VELO after the first data-taking period (Run I) and the ongoing Run II are presented in this paper. The main macroscopic parameters, influenced by particle fluence, are described along with selected methods of their monitoring. All the results show that VELO sustains the impact of high fluence of radiation, and its performance will not change significantly until the end of Run II.

• Item Type: Articles
• Additional Information: This work was supported in part by the National Research Center, Poland under Grant UMO-2016 /21/B/ST2/01083 and in part by the Faculty of Physics and Applied Computer Science AGH UST statutory tasks under Grant 11.11.220.01/4 within subsidy of Ministry of Science and Higher Education.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Dean, Cameron and Eklund, Prof Lars and Alexander, Dr Michael and Schiller, Dr Manuel
• Authors: Akiba, K., Alexander, M., Barter, W., Bell, L., Bogdanova, G., Borghi, S., Bowcock, T., Buchanan, E., Buytaert, J., de Capua, S., Chen, S., Collins, P., Crocombe, A., Dall'Occo, E., Dean, C., Dettori, F., Dreimanis, K., Dujany, G., Eklund, L., Evans, T., Gersabeck, M., Gershon, T., Hadavizadeh, T., Harrison, J., Hennessy, K., Hulsbergen, W., Hutchcroft, D., Jans, E., John, M., Kopciewicz, P., Koppenburg, P., Lafferty, G., Latham, T., Leflat, A., Majewski, M., Marinho, F., Mylroie-Smith, J., Oblakowska-Mucha, A., Parkes, C., Pearce, A., Poluektov, A., Pritchard, A., Qian, W., Redford, S., Richards, S., Rinnert, K., Rodrigues, E., Rodriguez, P., Schiller, M., Smith, M., Szumlak, T., van Beuzekom, M., Velthuis, J., Volkov, V., Wark, H., Webber, A., and Williams, M.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: IEEE Transactions on Nuclear Science
• Publisher: Institute of Electrical and Electronics Engineers (IEEE)
• ISSN: 0018-9499
• ISSN (Online): 0018-9499
• Copyright Holders: Copyright © 2018 IEEE
• First Published: First published in IEEE Transactions on Nuclear Science 65(5):1127-1132
• Publisher Policy: Reproduced under a Creative Commons License