CERN Accelerating science

Article
Report number	arXiv:2006.09559
Title	The upgrade I of LHCb VELO—towards an intelligent monitoring platform
Author(s)	Kopciewicz, P. (AGH-UST, Cracow) ; Szumlak, T. (AGH-UST, Cracow) ; Majewski, M. (AGH-UST, Cracow) ; Akiba, K. (Nikhef, Amsterdam) ; Augusto, O. (CERN) ; Back, J. (Warwick U.) ; Bobulska, D.S. (Glasgow U.) ; Bogdanova, G. (SINP, Moscow) ; Borghi, S. (Manchester U.) ; Bowcock, T. (Liverpool U.) ; Buytaert, J. (CERN) ; Lemos Cid, E. (Santiago de Compostela U.) ; Coco, V. (CERN) ; Collins, P. (CERN) ; Dall'Occo, E. (Nikhef, Amsterdam) ; de Bruyn, K. (CERN) ; de Capua, S. (Manchester U.) ; Dettori, F. (Liverpool U.) ; Dreimanis, K. (Liverpool U.) ; Dutta, D. (Manchester U.) ; Eklund, L. (Glasgow U.) ; Evans, T. (CERN) ; Meyer Garcia, L. (UFRJ, Rio de Janeiro) ; Boente García, O. (Santiago de Compostela U.) ; Gersabeck, M. (Manchester U.) ; Gershon, T. (Warwick U.) ; Sanchez Graz, C. (Nikhef, Amsterdam) ; Hennessy, K. (Liverpool U.) ; Hulsbergen, W. (Nikhef, Amsterdam) ; Hutchcroft, D. (Liverpool U.) ; Hynds, D. (Nikhef, Amsterdam) ; Jalocha, P. (Oxford U.) ; John, M. (Oxford U.) ; Jurik, N. (Oxford U.) ; Kostiuk, I. (Nikhef, Amsterdam) ; Latham, T. (Warwick U.) ; Leflat, A. (SINP, Moscow) ; Franco Lima, V. (Liverpool U.) ; Marinho, F. (UFRJ, Rio de Janeiro) ; Mendes, L.H. (UFRJ, Rio de Janeiro) ; Merk, M. (Nikhef, Amsterdam) ; Morris, A. (Warwick U.) ; Murray, D. (Manchester U.) ; Naik, S. (Glasgow U.) ; Nasteva, I. (UFRJ, Rio de Janeiro) ; Oblakowska-Mucha, A. (AGH-UST, Cracow) ; Otalora, J. (UFRJ, Rio de Janeiro) ; Parkes, C. (Manchester U.) ; Plana, B.G. (Santiago de Compostela U.) ; Fernández Prieto, A. (Santiago de Compostela U.) ; Rachwal, B. (AGH-UST, Cracow) ; Vázquez Regueiro, P. (Santiago de Compostela U.) ; Rinnert, K. (Liverpool U.) ; Rodrigues, G. (UFRJ, Rio de Janeiro) ; Scantlebury-Smead, L. (Oxford U.) ; Schiller, M. (Glasgow U.) ; Schindler, H. (CERN) ; Shears, T. (Liverpool U.) ; Snoch, A. (Nikhef, Amsterdam) ; Svihra, P. (Manchester U.) ; Gallas Torreira, A. (Santiago de Compostela U.) ; Van Beuzekom, M. (Nikhef, Amsterdam) ; Velthuis, J. (Bristol U.) ; Volkov, V. (SINP, Moscow) ; Williams, M. (Manchester U.) ; Funk, W. (CERN) ; Ferro-Luzzi, M. (CERN)
Publication	2020-06-04
Imprint	2020-06-16
Number of pages	11
In:	JINST 15, 06 (2020) pp.C06009
In:	15th Topical Seminar on Innovative Particle and Radiation Detectors (IPRD 2019), Siena, Italy, 14 - 17 Oct 2019, pp.C06009
DOI	10.1088/1748-0221/15/06/c06009 (publication) 10.1088/1748-0221/15/06/C06009 (publication)
Subject category	hep-ex ; Particle Physics - Experiment ; physics.ins-det ; Detectors and Experimental Techniques
Abstract	The Large Hadron Collider beauty (LHCb) detector is designed to detect decays of b- and c- hadrons for the study of CP violation and rare decays. At the end of the LHC Run 2, many of the LHCb measurements remained statistically dominated. In order to increase the trigger yield for purely hadronic channels, the hardware trigger will be removed, and the detector will be read out at 40 MHz. This, in combination with the five-fold increase in luminosity, requires radical changes to LHCb's electronics, and, in some cases, the replacement of entire sub-detectors with state-of-the-art detector technologies. The Vertex Locator (VELO) surrounding the interaction region is used to reconstruct the collision points (primary vertices) and decay vertices of long-lived particles (secondary vertices). The upgraded VELO will be composed of 52 modules placed along the beam axis divided into two retractable halves. The modules will each be equipped with 4 silicon hybrid pixel tiles, each read out by 3 VeloPix ASICs. The total output data rate anticipated for the whole detector will be around 1.6 Tbit/s. The highest occupancy ASICs will have pixel hit rates of approximately 900 Mhit/s, with the corresponding output data rate of 15 Gbit/s. The LHCb upgrade detector will be the first detector to read out at the full LHC rate of 40 MHz. The VELO upgrade will utilize the latest detector technologies to read out at this rate while maintaining the required radiation-hard profile and minimizing the detector material.
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