S. De Capua
A5067374015- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Computational Physics and Python Applications
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Superconducting Materials and Applications
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- Stochastic processes and statistical mechanics
- Cosmology and Gravitation Theories
- Distributed and Parallel Computing Systems
- International Science and Diplomacy
- Advanced NMR Techniques and Applications
- Advanced Data Storage Technologies
- Muon and positron interactions and applications
- Markov Chains and Monte Carlo Methods
- Nuclear Physics and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Pulsars and Gravitational Waves Research
University of Manchester
2016-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2023-2024
University of Oxford
2023
University of Bologna
2023
Université Paris-Saclay
2021
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
2021
Institut National de Physique Nucléaire et de Physique des Particules
2021
Centre National de la Recherche Scientifique
2011-2021
Peking University
2020
State Key Laboratory of Nuclear Physics and Technology
2020
The Vertex Locator (VELO) is a silicon microstrip detector that surrounds the proton-proton interaction region in LHCb experiment. performance of during first years its physics operation reviewed. system operated vacuum, uses bi-phase CO2 cooling system, and sensors are moved to 7 mm from LHC beam for data taking. stability these characteristic features described, details material budget given. calibration timing processing algorithms implemented FPGAs described. fully characterised. have...
The performance of the LHCb Muon system and its stability across full 2010 data taking with LHC running at ps = 7 TeV energy is studied. optimization detector setting time calibration performed first collisions delivered by described. Particle rates, measured for wide range luminosities beam operation conditions experienced during run, are compared values expected from simulation. space alignment detectors, chamber efficiency, resolution cluster size evaluated. found to be as specifications...
The LHCb VELO Upgrade I, currently being installed for the 2022 start of LHC Run 3, uses silicon microchannel coolers with internally circulating bi-phase \cotwo thermal control hybrid pixel modules operating in vacuum. This is largest scale application this technology to date. Production was completed July 2019 and assembly into cooling structures September 2021. paper describes R\&D path supporting production motivation design choices. have excellent peformance, low uniform mass, no...
The LHCb Vertex Locator (VELO) is a silicon strip detector designed to reconstruct charged particle trajectories and vertices produced at the interaction region. During first two years of data collection, 84 VELO sensors have been exposed range fluences up maximum value approximately 45 × 1012 1 MeV neutron equivalent (1 neq). At operational sensor temperature −7 °C, average rate current increase 18 μA per fb−1, in excellent agreement with predictions. effective bandgap has determined using...
SuperNEMO is a double-$\beta$ decay experiment, which will employ the successful tracker-calorimeter technique used in recently completed NEMO-3 experiment. implement 100 kg of isotope, reaching sensitivity to neutrinoless ($0\nu\beta\beta$) half-life order $10^{26}$ yr, corresponding Majorana neutrino mass 50-100 meV. One main goals and challenges detector development programme has been reach calorimeter energy resolution, $\Delta$E/E, around 3%/$sqrt(E)$(MeV) $\sigma$, or 7%/$sqrt(E)$(MeV)...
The BiPo-3 detector, running at the Canfranc Underground Laboratory (Laboratorio Subterr'aneo de Canfranc, LSC, Spain) since 2013, is a low-radioactivity detector dedicated to measuring ultra low natural radionuclide contaminations of 208Tl (232Th chain) and 214Bi (238U in thin materials. total sensitive surface area 3.6 m2. has been developed measure radiopurity selenium double β-decay source foils SuperNEMO experiment. In this paper design performance results background measurements...
Precise knowledge of the location material in LHCb vertex locator (VELO) is essential to reducing background searches for long-lived exotic particles, and identifying jets that originate from beauty charm quarks. Secondary interactions hadrons produced beam-gas collisions are used map VELO. Using this map, along with properties a reconstructed secondary its constituent tracks, $p$-value can be assigned hypothesis originates interaction. A validation procedure presented using photon...
Abstract The LHCb detector has undergone a major upgrade for LHC Run 3. This Upgrade I facilitates operation at higher luminosity and utilises full-detector information the collision rate, critically including use of vertex information. A new locator system, VELO Upgrade, been constructed. core element are double-sided pixelated hybrid silicon modules which operate in vacuum close to beam high radiation environment. construction quality assurance tests these described this paper. incorporate...
This article describes the high-speed system designed to meet challenging requirements for readout of new pixel VErtex LOcator (VELO) upgraded LHCb experiment. All elements electronics chain will be renewed cope with requirement ~40-MHz full-event rate. The sensors equipped VeloPix ASICs and placed at ~5 mm from Large Hadron Collider (LHC) beams in a secondary vacuum tank an extremely high nonhomogeneous radiation environment. front-end (FE) highest occupancy have pixel-hit rates above ~900...
The SuperNEMO experiment will search for neutrinoless double-beta decay (0νββ), and study the Standard-Model process (2νββ). technology can measure energy of each electrons produced in a (ββ) decay, reconstruct topology their individual tracks. spectrum requires very accurate calibration to be carried out periodically. Demonstrator Module calibrated using 42 sources, consisting droplet 207Bi within frame assembly. quality these which depends upon entire ^207Bi being contained frame, is key...
Abstract A radiochemical method for producing 82 Se sources with an ultra-low level of contamination natural radionuclides ( 40 K, decay products 232 Th and 238 U) has been developed based on cation-exchange chromatographic purification reverse removal impurities. It includes separation (purification), reduction, conditioning (which decantation, centrifugation, washing, grinding, drying), foil production. The stage, during which highly dispersed elemental selenium is obtained by the...
The new LHCb Vertex Locator (VELO) for LHCb, comprising a pixel detector and readout electronics, will be installed in 2021 data taking Run 3 at the LHC. electronics centers around "VeloPix" ASIC front-end operating trigger-less 40MHz. A custom serializer, called gigabit wireline transmitter (GWT), associated protocol have been designed VeloPix. GWT are sent from serializers of VeloPix line rate 5.12 Gb/s, reaching total 2–3 Tb/s full VELO detector. Data over 300-m optic-fiber links to...
The Large Hadron Collider beauty (LHCb) detector is designed to detect decays of b- and c- hadrons for the study CP violation rare decays. At end LHC Run 2, many LHCb measurements remained statistically dominated. In order increase trigger yield purely hadronic channels, hardware will be removed, read out at 40 MHz. This, in combination with five-fold luminosity, requires radical changes LHCb's electronics, and, some cases, replacement entire sub-detectors state-of-the-art technologies....
The LHCb detector has undergone a major upgrade for LHC Run 3. This Upgrade I facilitates operation at higher luminosity and utilises full-detector information the collision rate, critically including use of vertex information. A new locator system, VELO Upgrade, been constructed. core element are double-sided pixelated hybrid silicon modules which operate in vacuum close to beam high radiation environment. construction quality assurance tests these described this paper. incorporate 200 \mum...
The LHCb Muon system performance is presented using cosmic ray events collected in 2009. These allowed to test and optimize the detector configuration before LHC start. space time alignment measurement of chamber efficiency, resolution cluster size are described detail. results agreement with expected performance.
Vertex locator (VELO) is a silicon microstrip detector situated around the interaction point in large Hadron Collider beauty (LHCb) spectrometer at Large Collider. The LHCb experiment dedicated to studying charge conjugation and parity symmetry violation heavy flavor sector rare decays of B mesons. precise reconstruction both primary secondary vertices, obtained by VELO, crucial selection signal events containing b c quarks lifetime measurements. VELO consists two retractable parts that...