Rita Joana da Cruz Roque
A5071214589- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- CCD and CMOS Imaging Sensors
- Particle physics theoretical and experimental studies
- Nuclear Physics and Applications
- Astrophysics and Cosmic Phenomena
- Atmospheric Ozone and Climate
- Electrochemical Analysis and Applications
- Data-Driven Disease Surveillance
- Chemical and Physical Properties in Aqueous Solutions
- X-ray Diffraction in Crystallography
- Computational Physics and Python Applications
- Laser Design and Applications
- Spectroscopy and Laser Applications
- Cosmology and Gravitation Theories
- Photocathodes and Microchannel Plates
- Medical Imaging Techniques and Applications
- Electrodeposition and Electroless Coatings
- Radiation Therapy and Dosimetry
- Calibration and Measurement Techniques
- Geochemistry and Geologic Mapping
- Opportunistic and Delay-Tolerant Networks
- Corrosion Behavior and Inhibition
University of Coimbra
2017-2024
Sapienza University of Rome
2022-2024
Gran Sasso Science Institute
2024
Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre
2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso
2024
Istituto Nazionale di Fisica Nucleare
2024
Roma Tre University
2024
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2022
The search for a novel technology able to detect and reconstruct nuclear electron recoil events with the energy of few keV has become more important now that large regions high-mass dark matter (DM) candidates have been excluded. Moreover, detector sensitive incoming particle direction will be crucial in case DM discovery open possibility studying its properties. Gaseous time projection chambers (TPC) optical readout are very promising detectors combining detailed event information provided...
CYGNO is an international collaboration with the aim of operating a optical time projection chamber (TPC) for directional Dark Matter (DM) searches and solar neutrino spectroscopy, to be deployed at Laboratori Nazionali del Gran Sasso (LNGS). A / (60/40) mixture used, along triple Gas Electron Multiplier (GEM) cascade amplify ionization signal. The scintillation produced in electron avalanches read out using scientific complementary metal–oxide–semiconductor (sCMOS) camera. This solution has...
Abstract The nature of dark matter is still unknown and an experimental program to look for particles in our Galaxy should extend its sensitivity light the GeV mass range exploit directional information DM particle motion (Vahsen et al. CYGNUS: feasibility a nuclear recoil observatory with neutrinos, arXiv:2008.12587 , 2020). Cygno project studying gaseous time projection chamber operated at atmospheric pressure Gas Electron Multiplier (Sauli Nucl Instrum Meth A 386:531,...
Abstract The CYGNO collaboration is developing next generation directional Dark Matter (DM) detection experiments, using gaseous Time Projection Chambers (TPCs), as a robust method for identifying Weakly Interacting Massive Particles (WIMPs) below the Neutrino Fog. SF 6 potentially ideal this since it provides high fluorine content, enhancing sensitivity to spin-dependent interactions and, Negative Ion Drift (NID) gas, reduces charge diffusion leading improved positional resolution. CF 4 ,...
Abstract The CYGNO experiment aims to study rare events related the search for low-mass dark matter and solar neutrino events. One of main components background comes from cosmic rays that generate long tracks in detector’s images. interaction such particles with gas releases a variable energy profile along its trajectory form multiple cores can be easily reconstructed erroneously by being split into more than one cluster. Thus, this work offers newly adapted version well-known density-based...
Abstract We are going to discuss the R&D and prospects for CYGNO project, towards development of an innovative, high precision 3D tracking Time Projection Chamber with optical readout using He:CF 4 gas at 1 bar. uses a stack triple thin GEMs charge multiplication, this induces scintillation in CF gas, which is by PMTs sCMOS cameras. High granularity low noise along sampling PMT allows have head tail capability particle identification down O(keV) energy directional Dark Matter searches...
A gaseous imaging detector based on a cascade of two non-standard gas electron multipliers 100 μm thick GEM) was operated in five different krypton-based mixtures and the achievable position resolution determined. The micropattern (MPGD) has an active area 10 × 10cm2. GEM foils are twice as standard GEM, being more robust to electric discharges less prone sparking-caused damage. Krypton, noble with lowest value intrinsic range 14– 34 keV, is good candidate for applications detectors. Our...
Present methods for quantitative X-ray phase analysis make extensive use of multilinear regression. Practical application these compels workers to a choice among many different sets experimental conditions such as the number, identity and relative concentration phases in synthetic mixtures used solution regression problem; number extent angular regions within which intensities are be measured; so on. There yet no general criteria this selection, classical statistical methods, even effective...
A: The operation of a novel large area micro-patterned gaseous electron multiplier, made from 125 micron thick copper claded kapton foil, the COBRA_125, is presented.The CO-BRA_125 equiped with 3 independent electrodes which allow to establish 2 multiplication regions in single micro-patterened mutiplier.We report on COBRA_125 an active 100×100 mm .Charge gains above 10 4 and energy resolutions range 18%-20% were achieved mixture Ar-CH (90%-10%) by irradiation X-rays 55 Fe source.Gain stable...
The CYGNO project aims at developing a high resolution Time Projection Chamber with optical readout for directional dark matter searches and solar neutrino spectroscopy. Peculiar CYGNO’s features are the 3D tracking capability provided by combination of photomultipliers scientific CMOS camera signals, combined helium-fluorine-based gas mixture atmospheric pressure amplified electron multipliers structures. In this paper, performances achieved prototypes prospects upcoming underground...
Abstract Active Pixel sensors play a crucial role in enabling successful low-light scientific experiments due to their inherent advantages and capabilities. Such devices not only offer high spatial resolution but also feature individual pixels with integrated amplifiers, allowing for direct signal amplification at the pixel level. This results reduced readout noise improved signal-to-noise ratio (SNR), which are particularly vital when dealing limited photon counts environments. holds true...
The CYGNO project aims to develop a high-precision optical Time Projection Chamber (TPC) for directional Dark Matter search and solar neutrino spettroscopy, be hosted at Laboratori Nazionali del Gran Sasso (LNGS). distinctive feature of include the exploitation scientific CMOS cameras photomultiplier tubes coupled Gas Electron Multiplier amplification within helium-fluorine-based gas mixture atmospheric pressure. primary objective this is achieve three-dimentional tracking with head-tail...
The INFN Cloud project was launched at the beginning of 2020, aiming to build a distributed infrastructure and provide advanced services for scientific communities. A Platform as Service (PaaS) created inside that allows experiments develop access resources Software (SaaS), CYGNO is betatester this system. aim experiment realize large gaseous Time Projection Chamber based on optical readout photons produced in avalanche multiplication ionization electrons GEM stack. To extent, exploits...
The CYGNO project aims to study rare events, as low-mass (few GeV) Dark Matter (DM) particle or solar neutrino interactions, exploiting the approach of optical readout scintillation light produced in amplification a multiple Gas Electron Multiplier (GEM) structure, primary ionization originated large volume Time Projection Chamber (TPCs). is filled with an He:CF4 gas mixture at atmospheric pressure. 3D topology, and therefore direction recoils, reconstructed thanks combined use...
The CYGNO collaboration is developing next generation directional Dark Matter (DM) detection experiments, using gaseous Time Projection Chambers (TPCs), as a robust method for identifying Weakly Interacting Massive Particles (WIMPs) below the Neutrino Fog. SF6 potentially ideal this since it provides high fluorine content, enhancing sensitivity to spin-dependent interactions and, Negative Ion Drift (NID) gas, reduces charge diffusion leading improved positional resolution. CF4, although not...
Abstract Photoelectron signal amplification in gas photomultipliers (GPMs) is achieved through charge avalanche development the holes of a cascade hole-type microperforated foils. When voltage difference applied between metal film electrodes that are deposited on both surfaces those foils, an electric field with high intensity established inside holes. As consequence, each electron entering produces emerges from other side A few foils necessary for single primary to produce final intense...
The CYGNO experiment aims to build a large ($\mathcal{O}(10)$ m$^3$) directional detector for rare event searches, such as nuclear recoils (NRs) induced by dark matter (DM), weakly interactive massive particles (WIMPs). concept comprises time projection chamber (TPC), filled with He:CF$_4$ 60/40 scintillating gas mixture at room temperature and atmospheric pressure, equipped an amplification stage made of stack three electron multipliers (GEMs) which are coupled optical readout. latter...
Abstract The CYGNO experiment aims to build a large ( $$\mathcal {O}(10)$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>O</mml:mi> <mml:mo>(</mml:mo> <mml:mn>10</mml:mn> <mml:mo>)</mml:mo> </mml:mrow> </mml:math> m $$^3$$ <mml:mmultiscripts> <mml:mrow/> <mml:mn>3</mml:mn> </mml:mmultiscripts> ) directional detector for rare event searches, such as nuclear recoils (NRs) induced by dark matter (DM), weakly interactive massive particles (WIMPs). concept comprises...
The aim of the CYGNO project is to demonstrate capability a high resolution gaseous TPC based on sCMOS (scientific CMOS) optical readout for present and future directional Dark Matter searches at low WIMP masses (1-10 GeV) down beyond Neutrino Floor. medium-size astroparticle physics experiment that requires relatively small amount computing resources this reason can be subjected fragmentation utilization rate. This typical use case could exploit benefit from all features Cloud...
The Cygno project aims at the construction of a gaseous Time Projection Chamber (TPC) with optical readout for high precision three-dimensional tracking low energy nuclear and electronic recoils down to few keVs. efficient discrimination between these two processes represents main challenge modern dark matter direct detection experiments. In this context, TPCs are promising innovative technique that can reach very good 3D position reconstruction capabilities thanks performance latest...
The operation of a Micropattern Gaseous Detector (MPGD) comprising cascade two non-standard Gas Electron Multipliers (GEM) made from 100 μm kapton foil was evaluated in pure krypton and krypton-CO2 mixtures. final avalanche charge collected 2D strip readout, providing an active area 10×10 cm2 for the entire detection system. For each mixture, effective gain energy resolution were measured as function electric field drift, transfer induction regions. Using X-rays 55Fe radioactive source (5.9...