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LHCb Notes

Calibration software platform for LHCb upgrade silicon detectors: STORCK and TITANIA / Szumlak, Tomasz (AGH University of Science and Technology (PL))
LHCb-PUB-2021-007; CERN-LHCb-PUB-2021-007.- Geneva : CERN, 2021

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PACIFICr5 ASIC Data Sheet / Comerma Montells, Albert ; Mazorra De Cos, Jose (Univ. of Valencia and CSIC (ES))
The PACIFICr5 ASIC is a 64 channel Silicon Photo Multiplier readout circuit with current mode input and digital output developed for the LHCb Scintillating Fibre Tracker..
LHCb-PUB-2021-006; CERN-LHCb-PUB-2021-006.- Geneva : CERN, 2021 - 31. Fulltext: PDF;

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Tracking Definitions and Conventions for Run 3 and Beyond / Li, Peilian (Ruprecht Karls Universitaet Heidelberg (DE)) ; Rodrigues, Eduardo (University of Liverpool (GB)) ; Stahl, Sascha (CERN)
This note describes definitions, conventions and rules to measure the performance of detecting charged particles in the LHCb tracking detectors and, subsequently, reconstructing them with the track reconstruction software. In addition, the distributions of particles which can be reconstructed by the tracking detectors are studied using Monte Carlo simulation for Run 3..
LHCb-PUB-2021-005; CERN-LHCb-PUB-2021-005.- Geneva : CERN, 2021 - mult.p. Fulltext: PDF;

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Results of the survey on the effects of the Covid-19 pandemic on LHCb scientists / Dordei, Francesca (Universita e INFN, Cagliari (IT)) ; Ben Haim, Eli (Centre National de la Recherche Scientifique (FR)) ; Cicala, Flavia (University of Warwick (GB)) ; Klaver, Suzanne (Nikhef National institute for subatomic physics (NL)) ; Kopecna, Renata (Ruprecht Karls Universitaet Heidelberg (DE)) ; Lukashenko, Valeriia (Nikhef National institute for subatomic physics (NL)) ; Skidmore, Nicole (University of Bonn (DE))
In this note, we report the outcomes of a survey of LHCb scientists carried out during December 2020 regarding the social response to the Covid-19 pandemic. The survey was completed by 199 people, corresponding to about 14% of the collaboration. [...]
LHCb-PUB-2021-004; CERN-LHCb-PUB-2021-004.- Geneva : CERN, 2021 - 33. Fulltext: LHCb-PUB-2021-004 - PDF; figs_survey_mental_health - ZIP;

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LHCb Computing Resource usage in 2020 / Bozzi, Concezio (Universita e INFN, Ferrara (IT))
Abstract: This document reports the usage of computing resources by the LHCb collaboration during the period January 1st – December 31st, 2020. The data in the following sections have been compiled from the WLCG Accounting Utility (WAU) portal: [...]
LHCb-PUB-2021-003; CERN-LHCb-PUB-2021-003.- Geneva : CERN, 2021 - 35. Fulltext: PDF;

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LHCb Computing Resources: 2022 requests / Bozzi, Concezio (Universita e INFN, Ferrara (IT))
This document presents an assessment of the offline computing resources needed by LHCb in 2022, where data will be taken with the upgraded LHCb detector. The computing requests are based on the Computing Model Technical Design Report for the LHCb Upgrade, with adjustments due to the change of the LHC running schedule and the expected activities to be performed by the LHCb experiment
LHCb-PUB-2021-002; CERN-LHCb-PUB-2021-002.- Geneva : CERN, 2021 - 21. Fulltext: PDF;

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Characterisation of a new type of noise observed in Hamamatsu R11265 Multi-Anode Photomultipliers / Cavallero, Giovanni (CERN)
A new type of signal-induced-noise pulses is observed in Hamamatsu R11265 Multi-Anode Photomultipliers, manifesting up to several microseconds after the single-electron-response signal and being localised in specific anodes. The average number of these pulses is different between devices, and it presents a significant dependence on the applied high-voltage. [...]
LHCb-PUB-2021-001; CERN-LHCb-PUB-2021-001.- Geneva : CERN, 2021

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Probe for LUminosity MEasurement in LHCb / Barsuk, Sergey (Université Paris-Saclay (FR)) ; Roy, Laurent (CERN) ; Rochet, Jacky (CERN) ; Panshin, Gennady (National Research Tomsk Polytechnic University (RU)) ; Sanders, Freek (Nikhef National institute for subatomic physics (NL)) ; Balagura, Vladislav (Centre National de la Recherche Scientifique (FR)) ; Fleuret, Frederic (Centre National de la Recherche Scientifique (FR)) ; Maurice, Emilie Amandine (Centre National de la Recherche Scientifique (FR)) ; Beigbeder-Beau, Christophe (Université Paris-Saclay (FR)) ; Burmistrov, Leonid (Université Paris-Saclay (FR)) et al.
A new detector capable of measuring the luminosity and beam conditions of the Large Hadron Collider (LHC) is proposed at the interaction point of the LHCb experiment. It will enable real time monitoring of beam parameters, which is of paramount importance in order to safely operate the LHC and its experiments in the beam conditions foreseen for Run 3, starting in 2021, and beyond, towards the High-Luminosity (HL) phase. [...]
LHCb-PUB-2020-008; CERN-LHCb-PUB-2020-008.- Geneva : CERN, 2020 - mult.p. Fulltext: PDF;

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Implementation of large-scale FPGA reconfiguration with CvP in the control system of the LHCb Experiment at CERN / Achour, Mohamed (CERN)
This report present the work done during the internship period held in the LHCb group at CERN. LHCb or Large Hadron Collider beauty, is an experiment among many others at CERN, using a large number of FPGA boards for data processing and data acquisition, making a full chip reconfiguration for all those boards may consume a lot of time and effort, so the partial reconfiguration mechanism is the privileged solution to deal with that issue, PR feature is used to dynamically reconfigure some parts in the design during FPGA runtime mode, without resetting or power cycling the whole system. [...]
LHCb-PUB-2020-007; CERN-LHCb-PUB-2020-007.- Geneva : CERN, 2020 Fulltext: PDF;

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TORCH physics performance : improving low-momentum PID performance during Upgrade IB and beyond / Bhasin, Srishti (University of Bristol (GB)) ; Blake, Thomas (University of Warwick (GB)) ; Cicala, Flavia (University of Warwick (GB)) ; Forty, Roger (CERN) ; Frei, Christoph (CERN) ; Gabriel, Emmy Pauline Maria (Nikhef National institute for subatomic physics (NL)) ; Gambetta, Silvia (The University of Edinburgh (GB)) ; Gao, Rui (University of Oxford (GB)) ; Gershon, Timothy (University of Warwick (GB)) ; Gys, Thierry (CERN) et al.
This document details the status of simulation studies for the proposed TORCH detector for operation during Upgrade Ib. The anticipated physics performance in key progresses is presented, alongside a summary of the R&D; status. [...]
LHCb-PUB-2020-006; CERN-LHCb-PUB-2020-006.- Geneva : CERN, 2020 - mult.p. Fulltext: PDF;

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