Radiation Damage Effects and Operation of the LHCb Vertex Locator

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Akiba, K, Alexander, M, Barter, W, Bell, L, Bogdanova, G, Borghi, S, Bowcock, T ORCID: 0000-0002-3505-6915, Buchanan, E, Buytaert, J, de Capua, S et al (show 47 more authors) , 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 ORCID: 0000-0002-1529-8087, Hulsbergen, W, Hutchcroft, D ORCID: 0000-0002-4174-6509, 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 ORCID: 0000-0002-5177-9136, Webber, A and Williams, M (2018) Radiation Damage Effects and Operation of the LHCb Vertex Locator. .

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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:	Conference or Workshop Item (Unspecified)
Uncontrolled Keywords:	Depletion voltage, effective doping, leakage current, large Hadron Collider beauty (LHCb), radiation damage, silicon detector, vertex locator (VELO)
Depositing User:	Symplectic Admin
Date Deposited:	10 Sep 2018 13:59
Last Modified:	14 Mar 2024 23:32
DOI:	10.1109/TNS.2018.2824618
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3025689