R. De Oliveira

ORCID: 0000-0003-3382-3137
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About
Contact & Profiles
Research Areas
  • Particle Detector Development and Performance
  • Radiation Detection and Scintillator Technologies
  • Particle physics theoretical and experimental studies
  • CCD and CMOS Imaging Sensors
  • Dark Matter and Cosmic Phenomena
  • Atomic and Subatomic Physics Research
  • High-Energy Particle Collisions Research
  • Plasma Diagnostics and Applications
  • Muon and positron interactions and applications
  • Nuclear Physics and Applications
  • Quantum Chromodynamics and Particle Interactions
  • Neutrino Physics Research
  • Radiation Effects in Electronics
  • Silicon Carbide Semiconductor Technologies
  • Photocathodes and Microchannel Plates
  • Superconducting Materials and Applications
  • Particle Accelerators and Free-Electron Lasers
  • Magnetic Field Sensors Techniques
  • Semiconductor materials and devices
  • Radiation Therapy and Dosimetry
  • Advancements in Photolithography Techniques
  • Advancements in Semiconductor Devices and Circuit Design
  • Electrical and Thermal Properties of Materials
  • Sensor Technology and Measurement Systems
  • Advancements in PLL and VCO Technologies

European Organization for Nuclear Research
2015-2024

University of Aveiro
2024

Polish Academy of Sciences
2024

Southwest Bahia State University
2024

Nicolaus Copernicus Astronomical Center
2024

University of California, Davis
2023

American University of the Middle East
2022

Panjab University
2020

Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2007-2019

Florida Institute of Technology
2018

10.1016/j.nima.2005.12.222 article EN Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 2006-01-24

10.1016/j.nima.2011.03.025 article EN Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 2011-04-14

A new Micromegas manufacturing technique, based on kapton etching technology, has been developed recently, resulting in further improvement of the characteristics detector, such as uniformity and stability. Excellent energy resolution obtained, reaching 11% FWHM for 5.9 keV photon peak the55Fe X-ray source 1.8% (with possible evidence less than 1%) 5.5 MeV alpha 241Am source. The Microbulk detector shows several advantages like flexible structure, low material high radio-purity, opening thus...

10.1088/1748-0221/5/02/p02001 article EN Journal of Instrumentation 2010-02-01

In this work we present a novel idea for compact spark-protected single amplification stage Micro-Pattern Gas Detector (MPGD). The detector stage, realized with structure very similar to GEM foil, is embedded through resistive layer in the readout board. A cathode electrode, defining gas conversion/drift gap, completes mechanics. new structure, that call micro-Resistive WELL (μ-RWELL), has some characteristics common previous MPGDs, such as C.A.T. and WELL, developed more than ten years ago....

10.1088/1748-0221/10/02/p02008 article EN cc-by Journal of Instrumentation 2015-02-18

In this document, we present the Technical Design Report of Upgrade T2K Near Detector ND280. The goal upgrade is to improve performance measure neutrino interaction rate and constrain cross-sections so that uncertainty in number predicted events at Super-Kamiokande reduced about 4%. This will allow physics reach T2K-II project. achieved by modifying upstream part detector, adding a new highly granular scintillator detector (Super-FGD), two TPCs (High-Angle TPC) six TOF planes. Details...

10.48550/arxiv.1901.03750 preprint EN other-oa arXiv (Cornell University) 2019-01-01

10.1016/s0168-9002(98)01405-3 article EN Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 1999-04-01

A low-background Micromegas detector has been operating in the CAST experiment at CERN for search solar axions during first phase of (2002–2004). The detector, made out low radioactivity materials, operated efficiently and achieved a very high level background rejection (5 × 10−5 counts keV−1 cm−2 s−1) without shielding.

10.1088/1367-2630/9/6/170 article EN cc-by New Journal of Physics 2007-06-22

10.1016/j.nima.2007.03.010 article EN Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 2007-03-19

The $\mu$-RWELL is a single-amplification stage resistive Micro-Pattern Gaseous Detector (MPGD). detector amplification element realized with single copper-clad polyimide foil micro-patterned blind hole (well) matrix and embedded in the readout PCB through thin Diamond-Like-Carbon (DLC) sputtered film. introduction of layer, suppressing transition from streamer to spark, allows achieve large gains ($\geq$10$^4$) stage, while partially reducing capability stand high particle fluxes. simplest...

10.1088/1748-0221/14/05/p05014 article EN cc-by Journal of Instrumentation 2019-05-16

In 2008, a triple GEM detector prototype with an area of ∼ 2000 cm2 has been constructed, based on foils 66 × cm. GEMs such dimensions had not made before, and innovations to the existing technology were introduced build this detector. This paper discusses these presents further work large development. A single-mask technique overcomes cumbersome practice alignment two masks, which limits achievable lateral size. The holes obtained are conical, have so-called rim, small insulating clearance...

10.1088/1748-0221/4/12/p12009 article EN Journal of Instrumentation 2009-12-10

The idea of implementing electroluminescence-based amplification through transparent multi-hole structures (FAT-GEMs) has been entertained for some time. Arguably, such a technology to be attractive it should perform at least level comparable conventional alternatives based on wires or meshes. We present now detailed calorimetric study carried out 5.9 keV X-rays in xenon, pressures ranging from 2 10 bar, resorting different geometries, production and post-processing techniques. At reference...

10.3389/fdest.2024.1373235 article EN cc-by Frontiers in Detector Science and Technology 2024-04-03

Abstract In recent years, resistive Micromegas detectors have undergone an intense R&D phase to ensure their technological advancements for safe operation under diverse experimental conditions. Both low and high-rate versions matured be employed in upgrades of current detectors, large apparatuses at future colliders, applications beyond high-energy physics. Thus far, the advancement development been primarily conducted CERN. The state-of-the-art technology includes structures based on...

10.1088/1748-0221/20/04/c04020 article EN cc-by Journal of Instrumentation 2025-04-01

10.1016/j.nima.2010.09.171 article EN Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 2010-10-13

Silicon detectors for the Roman Pots of large hadron collider TOTEM experiment aim full sensitivity at edge where a terminating structure is required electrical stability. This work provides an innovative approach reducing conventional width to less than 100 microns, still using standard planar fabrication technology. The objective this new development decouple electric behaviour surface from sensitive volume within tens microns. explanation basic principle together with experimental...

10.1109/tns.2005.856910 article EN IEEE Transactions on Nuclear Science 2005-10-01

We have developed and tested several prototypes of GEM-like detectors with electrodes coated resistive layers or completely made materials. These can operate stably at gains close to 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">5</sup> . The limit the energy discharges appearing higher thus making very robust. demonstrated that cathodes some these could be by CsI SbCs enhance detection efficiency for UV visible photons. also discovered...

10.1109/tns.2007.905160 article EN IEEE Transactions on Nuclear Science 2007-10-01
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