J. de Carvalho Saraiva
A5102897341- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Dark Matter and Cosmic Phenomena
- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- High-Energy Particle Collisions Research
- CCD and CMOS Imaging Sensors
- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Radiation Effects in Electronics
- Medical Imaging Techniques and Applications
- Muon and positron interactions and applications
- Radiation Therapy and Dosimetry
- Human Mobility and Location-Based Analysis
- Distributed systems and fault tolerance
- Graphite, nuclear technology, radiation studies
- Water Quality Monitoring Technologies
- Graph Theory and Algorithms
- Geophysical and Geoelectrical Methods
- Smart Agriculture and AI
- Particle Accelerators and Free-Electron Lasers
- Green IT and Sustainability
- Magnetic confinement fusion research
- Quantum Chromodynamics and Particle Interactions
LIP - Laboratory of Instrumentation and Experimental Particle Physics
2019-2024
University of Coimbra
2020-2024
Polytechnic Institute of Viseu
2023
European Organization for Nuclear Research
2015-2018
A bstract Heavy Neutral Leptons (HNLs) are hypothetical particles predicted by many extensions of the Standard Model. These can, among other things, explain origin neutrino masses, generate observed matter-antimatter asymmetry in Universe and provide a dark matter candidate. The SHiP experiment will be able to search for HNLs produced decays heavy mesons travelling distances ranging between $$ \mathcal{O} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>O</mml:mi>...
This paper presents a fast approach to simulating muons produced in interactions of the SPS proton beams with target SHiP experiment. The experiment will be able search for new long-lived particles 400 GeV/c beam dump and which travel distances between fifty metres tens kilometers. detector needs operate under ultra-low background conditions requires large simulated samples muon induced processes. Through use Generative Adversarial Networks it is possible emulate simulation interaction...
The Search for Hidden Particles (SHiP) Collaboration has shown that the CERN SPS accelerator with its 400 GeV/c proton beam offers a unique opportunity to explore Sector [1–3]. proposed experiment is an intensity frontier which capable of searching hidden particles through both visible decays and scattering signatures from recoil electrons or nuclei. high-intensity experimental facility developed by SHiP based on number key features developments provide possibility probing large part...
In this work we explore readout architectures for the simultaneous high-resolution timing and bidimensional tracking of charged particles with Resistive Plate Chambers (TOF-tracker) accurate detection gamma rays PET imaging. On 625 $cm^2$ active area obtained a time resolution 61 ps $\sigma$ position below 150 $\mu$m from cosmic rays. An intrinsic precision 0.49 mm FWHM was determined localization small $\beta^+$ source via its annihilation radiation.
Dark photons are hypothetical massive vector particles that could mix with ordinary photons. The simplest theoretical model is fully characterised by only two parameters: the mass of dark photon m$_{\gamma^{\mathrm{D}}}$ and its mixing parameter photon, $\varepsilon$. sensitivity SHiP detector reviewed for in range between 0.002 10 GeV. Different production mechanisms simulated, decaying to pairs visible fermions, including both leptons quarks. Exclusion contours presented compared those...
The radiation environment encountered at high-energy hadron accelerators strongly differs from the relevant for space applications. mixed-field expected modern is composed of charged and neutral hadrons (protons, pions, kaons neutrons), photons, electrons, positrons muons, ranging very low (thermal) energies up to TeV range. This complex field, which extensively simulated by Monte Carlo codes (e.g. FLUKA) due beam losses in experimental areas, distributed along machine collimation points)...
A bstract Dark matter is a well-established theoretical addition to the Standard Model supported by many observations in modern astrophysics and cosmology. In this context, existence of weakly interacting massive particles represents an appealing solution observed thermal relic Universe. Indeed, large experimental campaign ongoing for detection such sub-GeV mass range. Adopting benchmark scenario light dark produced decay photon, with α D = 0 . 1 m ′ 3 χ , we study potential SHiP experiment...
A feasibility study has been performed in order to investigate the performance of HADES detector measure electromagnetic decays hyperon resonances $\Sigma(1385)^0$, $\Lambda(1405)$ and $\Lambda{\Lambda}(1520)$ as well production double strange baryon systems $\Xi^-$ $\Lambda\Lambda$ p+p reactions at a beam kinetic energy 4.5 GeV. The existing will be upgraded by new Forward Detector, which extends acceptance into range polar angles that plays crucial role for these investigations. analysis...
We propose to build and operate a detector that, for the first time, will measure process $pp\to\nu X$ at LHC search feebly interacting particles (FIPs) in an unexplored domain. The TI18 tunnel has been identified as suitable site perform these measurements due very low machine-induced background. be off-axis with respect ATLAS interaction point (IP1) and, given pseudo-rapidity range accessible, corresponding neutrinos mostly come from charm decays: proposed experiment thus make test of...
The SHiP-charm project was proposed to measure the associated charm production induced by 400 GeV/c protons in a thick target, including contribution from cascade production. An optimisation run performed July 2018 at CERN SPS using hybrid setup. high resolution of nuclear emulsions acting as vertex detector complemented electronic detectors for kinematic measurements and muon identification. Here we present first results on analysis exposed run, which prove capability reconstructing proton...
Abstract The SHiP experiment is proposed to search for very weakly interacting particles beyond the Standard Model which are produced in a 400 GeV/c proton beam dump at CERN SPS. About $$10^{11}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mn>10</mml:mn><mml:mn>11</mml:mn></mml:msup></mml:math> muons per spill will be dump. To design such that muon-induced background minimized, precise knowledge of muon spectrum required. validate flux generated by our Pythia and...
We present first results from a Positron Emission Tomography (PET) scanner demonstrator based on Resistive Plate Chambers and specialized for brain imaging. The device features 30 cm wide cubic field-of-view each detector comprises 40 gas gaps with 3D location of the interaction point photon. Besides other imagery, we show that reconstructed image resolution, as evaluated by hot-rod phantom, is sub-millimetric, which beyond state-of-the-art standard PET technology this application.
CERN CHARM facility provides a unique complex radiation environment characterized by particle energy spectra representative of high-energy accelerators, ground and atmospheric conditions space applications. is conceived to be an irradiation for the qualification large electronic systems components in mixed field generated from interaction 24 GeV/c proton beam with copper or aluminium target. A movable shielding made layers concrete iron allows changing hardness population (neutron, proton,...
With the popularity of smartphones and mobile devices, application (a.k.a. "app") markets have been growing exponentially in terms number users downloads. To increase user satisfaction, app developers invest a lot work into gathering utilizing input. This paper presents an analysis market through development app. The provides with overview most important statistics, including best apps each category, categories apps, overall statistics. data was collected publicly available annual reports,...
This paper presents a comprehensive analysis and evaluation of the performance scalability characteristics graph databases. The study focuses on leading databases, namely Neo4j, JanusGraph, MemGraph, Nebula-Graph, TigerGraph, as ranked by DB-Engines. In face ever-increasing daily data volumes, traditional database management systems (DBMS) are struggling to cope with growth, necessitating exploration alternative solutions. Graph along other types such document key-value have emerged...
We present experimental results on the counting rate measurements for several single-gap 10B lined resistive plate chambers (10B-RPCs) with anodes made from standard float glass, low-resistivity glass and ceramic. The were performed at V17 monochromatic neutron beamline (3.35 Å) Helmholtz-Zentrum Berlin. For 10B-RPCs 0.28mm thick a maximum density of about 8 × 103 Hz/cm2 was obtained. In case low resistivity ceramic, did not deviate linear dependence flux up to available this exceeded value...
The LouMu team joins together specialists in particle detectors and cosmic ray analyses, geophysicists science communicators to muograph an underground gallery of old mine, now open visitors a museum.The muon telescope is made Resistive Plate Chambers (RPCs) developed operate stably with low consumption at remote locations, it has been tested the Coimbra University, before being moved Lousal Ciência Viva Science Center, Portugal.In parallel scientific goals surveying geological faults around...
Recently we have proposed a new concept of thermal neutron detector based on resistive plate chambers and 10B4C solid converters, enabling to readout with high resolution in both the 3D position capture time flight (ToF). In this paper, report results first beam tests conducted RPC detection module, coupled units design. The main focus is measurements ToF identification converter layer where captured, giving along direction.
Abstract Recently we have proposed a new concept of thermal neutron detector based on resistive plate chambers and 10 B 4 C solid converters, enabling to readout with high resolution in both the 3D position capture time flight (ToF). In this paper, report results first beam tests conducted RPC detection module, coupled units design. The main focus is measurements ToF identification converter layer where captured, giving along direction.