L.G. Garcia Ordòñez
A5101430246- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Radiation Detection and Scintillator Technologies
- CCD and CMOS Imaging Sensors
- Astrophysics and Cosmic Phenomena
- Embedded Systems Design Techniques
- Dark Matter and Cosmic Phenomena
- Nuclear Physics and Applications
- Advanced Data Storage Technologies
- Marine and coastal plant biology
- Analog and Mixed-Signal Circuit Design
- Neutrino Physics Research
- Cellular Automata and Applications
- Coral and Marine Ecosystems Studies
- Embedded Systems and FPGA Design
- Atomic and Subatomic Physics Research
- Image Processing Techniques and Applications
- Electrostatic Discharge in Electronics
- Advanced X-ray and CT Imaging
- Advanced Optical Imaging Technologies
- Radio Astronomy Observations and Technology
- Low-power high-performance VLSI design
- Digital Holography and Microscopy
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2020-2024
The Abdus Salam International Centre for Theoretical Physics (ICTP)
2019-2024
A. Alikhanyan National Laboratory
2023
University of Trieste
2020-2023
University of Aveiro
2021-2023
University of San Carlos of Guatemala
2010-2021
National University of San Luis
2021
École Polytechnique Fédérale de Lausanne
2020
University of Geneva
2020
We study the spin-exotic $J^{PC} = 1^{-+}$ amplitude in single-diffractive dissociation of 190 GeV$/c$ pions into $\pi^-\pi^-\pi^+$ using a hydrogen target and confirm $\pi_1(1600) \to \rho(770) \pi$ amplitude, which interferes with nonresonant $1^{-+}$ amplitude. demonstrate that conflicting conclusions from previous studies on these amplitudes can be attributed to different analysis models treatment dependence squared four-momentum transfer we thus reconcile their experimental findings....
The production of vector mesons in deep inelastic scattering is an interesting yet scarsely explored channel to study the transverse spin structure nucleon and related phenomena. COMPASS collaboration has performed first measurement Collins Sivers asymmetries for inclusively produced $\rho^0$ mesons. analysis based on data set collected $2010$ using a $160\,\,\rm{GeV}/c$ $\mu^+$ beam impinging transversely polarized $\rm{NH}_3$ target. $\rho^{0}$ are selected from oppositely charged hadron...
A set of measurements azimuthal asymmetries in the production pairs identified hadrons deep-inelastic scattering muons on transversely polarised 6LiD (deuteron) and NH3 (proton) targets is presented. All available data collected years 2003–2004 2007/2010 with COMPASS spectrometer using a muon beam 160GeV/c at CERN SPS were analysed. The provide access to transversity distribution functions via fragmentation function that principle may be independently obtained from e+e− annihilation data....
New results are presented on a high-statistics measurement of Collins and Sivers asymmetries charged hadrons produced in deep inelastic scattering muons transversely polarized ^{6}LiD target. The data were taken 2022 with the COMPASS spectrometer using 160 GeV muon beam at CERN, statistically balancing existing proton targets. first from about two-thirds new have total uncertainties smaller by up to factor three compared previous deuteron measurements. Using all results, both transversity...
Assessments of reef sediments in the North Ari Atoll (Maldives) were conducted 2015 and 2018 on reefs three islands with different management strategies: community, resort, uninhabited. Indices applied Foraminifera Reef Assessment Monitoring Index (FI) Sediment Constituents (SI). Both indices are based shells or fragments functional groups, which for FI foraminiferal SI sediment components. The is considered to be an indicator water quality quality, community structure, processes such as...
A portable architectural design strategy is described for the implementation of reconfigurable virtual instrumentation based on programmable Systems-on-Chip integrating microprocessors and FPGA in same physical device. The key role played by a general purpose communication block as means to efficiently separate activities carried out microprocessor FPGA. Both parts interact according simple logic protocols reading writing data common memory resources block. architecture proposed system can...
A simplified correlation index is proposed to be used in real-time pulse shape recognition systems. This similar the classic Pearson's coefficient, but it can efficiently implemented FPGA devices with far fewer logic resources and excellent performance. Numerical simulations synthetic data comparisons show suitability of applications such as discrimination counting pulses a predefined shape. Superior performance evident signal-to-noise ratio scenarios close unity. implementation Person's...
The Amphistegina Bleaching Index (ABI) was applied to three Maldivian reefs in the Rasdhoo and North Ari Atolls 2018, during normal sea surface temperature conditions. This dataset then compared with a 2015, pre-coral bleaching study. results provide context for verification application of ABI outlining photo-inhibitory stress status coral outside Florida Reef Tract where it originally developed. sampling periods encompass different seasons regimes. 2015 field preceeded El Niño induced, mass...
Zynq-7000 devices from Xilinx has gained strong popularity in the last years. Several documents and examples about interfaces usage how to communicate programmable logic with processor are available, but some of them not properly explained particular, maximum throughput is clearly specified. With this purpose, work a measurement method presented applied over five available interfaces, considering most used alternatives. Tests were carried on Zybo board, results can be easily estimate...
The distinction of secondary particles in extensive air showers, specifically muons and electrons, is one the requirements to perform a good measurement composition primary cosmic rays. We describe two methods for pulse shape detection discrimination electrons implemented on FPGA. One uses an artificial neural network (ANN) algorithm; other exploits correlation approach based finite impulse response (FIR) filters. novel hls4ml package used build ANN inference model. Both were tested Xilinx...
Configuring and setting up a remote access laboratory for an advanced online school on fully programmable System-on-Chip (SoC) proved to be outstanding challenge. The school, jointly organized by the International Centre Theoretical Physics (ICTP) Atomic Energy Agency (IAEA), focused SoC its applications nuclear scientific instrumentation was mainly addressed physicists, computer scientists engineers from developing countries. use of e-learning tools, which some them adopted others...
Based on the observation of sizeable target-transverse-spin asymmetries in single-hadron and hadron-pair production Semi-Inclusive measurements Deep Inelastic Scattering (SIDIS), chiral-odd transversity quark distribution functions $h_1^q$ are nowadays well established. Several possible channels to access these were originally proposed. One candidate is measurement polarisation $\Lambda$ hyperons produced SIDIS off transversely polarised nucleons, where transverse struck might be transferred...
Abstract We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive $$\rho ^0$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>ρ</mml:mi> <mml:mn>0</mml:mn> </mml:msup> </mml:math> meson muoproduction at COMPASS using 160 GeV/ c polarised $$ \mu ^{+}$$ <mml:mi>μ</mml:mi> <mml:mo>+</mml:mo> and ^{-}$$ <mml:mo>-</mml:mo> beams impinging liquid hydrogen target. The covers the kinematic range 5.0 $$c^2$$ <mml:mi>c</mml:mi>...
The Latin American Giant Observatory (LAGO) is an extended cosmic ray observatory composed by a network of water-Cherenkov detectors spanning over different sites located at significantly altitudes (from sea level up to more than $5000$\,m a.s.l.) and latitudes across America, covering huge range geomagnetic rigidity cut-offs atmospheric absorption/reaction levels. This detection designed measure the temporal evolution radiation flux ground with extreme detail. LAGO project mainly oriented...
The COMPASS Collaboration performed measurements of the Drell-Yan process in 2015 and 2018 using a 190 GeV/c π^{-} beam impinging on transversely polarized ammonia target. Combining data both years, we present final results amplitudes five azimuthal modulations, which correspond to transverse-spin-dependent asymmetries (TSAs) dimuon production cross section. Three them probe nucleon leading-twist Sivers, transversity, pretzelosity transverse-momentum dependent (TMD) parton distribution...
The multiplicities of positive and negative pions, kaons unidentified hadrons produced in deep-inelastic scattering are measured bins the Bjorken scaling variable $x$, relative virtual-photon energy $y$ fraction transferred to final-state hadron $z$. Data were obtained by COMPASS Collaboration using a 160 GeV muon beam both electric charges liquid hydrogen target. These measurements cover kinematic domain with photon virtuality $Q^2 > 1$ (GeV/$c)^2$, $0.004 < x 0.4$, $0.1 y 0.7$ $0.2 z...
A new and detailed measurement of the cross section for hard exclusive neutral-pion muoproduction on proton was performed in a wide kinematic region, with photon virtuality $Q^2$ ranging from 1 to 8 (GeV/$c$)$^{\rm\, 2}$ Bjorken variable $x_{\rm Bj}$ 0.02 0.45. The data were collected at COMPASS CERN using 160 GeV/$c$ longitudinally polarised $\mu^+$ $\mu^-$ beams scattering off 2.5 m long liquid hydrogen target. From average measured sections, virtual-photon--proton is determined as...
Abstract The COMPASS RICH-1 detector underwent major upgrade in 2016 with the installation of four novel MPGD-based photon detectors. They consist large-size hybrid MPGDs multi-layer architecture composed two layers Thick-GEMs and bulk resistive Micromegas. A dedicated high voltage power supply system, realized commercial devices, has been put operation to protect detectors against errors by operator, monitor log voltages currents at a 1 Hz rate, automatically react misbehavior; it includes...
Data logging and complex algorithm implementations acting on multichannel systems with independent devices require the use of time synchronization. In case Gas Electron Multipliers (GEM) Thick-GEM (THGEM) detectors, biasing potential can be generated at detector level via DC to converters operating floating voltage. this case, high voltage isolation buffers may used allow communication between different channels. However, their add non-negligible delays in transmission channel, complicating...