R
R. Ribeiro
Researcher at CERN
Publications - 30
Citations - 309
R. Ribeiro is an academic researcher from CERN. The author has contributed to research in topics: Detector & Cherenkov radiation. The author has an hindex of 10, co-authored 30 publications receiving 304 citations. Previous affiliations of R. Ribeiro include Faculdade de Engenharia da Universidade do Porto & University of Coimbra.
Papers
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Journal ArticleDOI
The application of genetic algorithms for shape control with piezoelectric patches—an experimental comparison
TL;DR: In this article, a finite element model based on Mindlin plate theory was used to characterize the behaviour of the structure and the actuators. But the authors focused on the development of an efficient and general methodology, based on genetic algorithms, for the determination of the optimal actuation voltages needed to apply to the piezoelectric actuators in such a way that a pre-defined shape of a structure is achieved.
Journal ArticleDOI
Clear-PEM: A PET imaging system dedicated to breast cancer diagnostics
M.C. Abreu,D. Aguiar,E. Albuquerque,F. G. Almeida,Pedro Almeida,Pedro Amaral,Etiennette Auffray,P. Bento,Peter Bruyndonckx,R. Bugalho,B. Carrico,H. Cordeiro,Márcio Ferreira,Nuno Ferreira,F. Goncalves,Paul Lecoq,C. Leong,F. Lopes,P. Lousã,Joan Luyten,M.V. Martins,Nuno Matela,Pedro Rato Mendes,R. Moura,J. Nobre,Nuno Oliveira,Catarina Ortigao,Luis Peralta,J. Rego,R. Ribeiro,Pedro Rodrigues,Ana Santos,João Carlos Silva,M. M. V. G. Silva,Stefaan Tavernier,Isabel C. Teixeira,João Paulo Teixeira,A. Trindade,J. Trummer,Joao Varela +39 more
TL;DR: The Clear-PEM scanner for positron emission mammography under development is described in this paper, which is based on pixelized LYSO crystals optically coupled to avalanche photodiodes and readout by a fast low-noise electronic system.
Journal ArticleDOI
Clear-PEM: A dedicated pet camera for improved breast cancer detection
M.C. Abreu,Pedro Almeida,F. Balau,Nuno Ferreira,S.T.G. Fetal,F.A.F. Fraga,M.V. Martins,Nuno Matela,R. Moura,Catarina Ortigao,Luis Peralta,P. Rato,R. Ribeiro,Pedro Rodrigues,Ana Santos,A. Trindade,J. Varela +16 more
TL;DR: The concept of Clear-PEM, the system presently developed in the frame of the Crystal Clear Collaboration at CERN, will be a dedicated scanner, offering better perspectives in terms of position resolution and detection sensitivity.
Journal ArticleDOI
Fast RICH detector with a cesium iodide photocathode at atmospheric pressure
André Braem,A. DiMauro,E. Nappi,A. Ljubicic,G. Paic,F. Piuz,F. Posa,R. Ribeiro,T. Scognetti,T.D. Williams +9 more
TL;DR: In this paper, a Cherenkov angular resolution of 8 mrad is obtained by detecting a mean of 8 photoelectrons per ring per ring, and the results obtained with photons impinging at a large angle on the CsI layer are presented and discussed in comparison with higher quantum efficiencies observed under different experimental conditions.
Proceedings ArticleDOI
Design and evaluation of the clear-PEM detector for positron emission mammography
Ana Santos,Pedro Almeida,M.V. Martins,Nuno Matela,Nuno Oliveira,Nuno Ferreira,Janaina Marques de Aguiar,F. G. Almeida,F. Lopes,José Paulo Sampaio,P. Bento,F. Goncalves,C. Leong,P. Lousa,Luan F. F. Silva,I. Teixeira,João Paulo Teixeira,M.C. Abreu,B. Carrico,Pedro Rato Mendes,R. Pereira,Pedro Sousa,Miguel A. Ferreira,R. Moura,Catarina Ortigao,Luis Peralta,R. Ribeiro,Pedro Rodrigues,João Carlos Silva,A. Trindade,Joao Varela +30 more
TL;DR: Experimental validation of the detection techniques, namely the basic properties of the radiation sensors and the ability to measure the depth-of-interaction of the incoming photons, are presented.