F
F.A.F. Fraga
Researcher at University of Coimbra
Publications - 25
Citations - 541
F.A.F. Fraga is an academic researcher from University of Coimbra. The author has contributed to research in topics: Scintillation & Detector. The author has an hindex of 13, co-authored 25 publications receiving 519 citations.
Papers
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Journal ArticleDOI
CCD readout of GEM-based neutron detectors
F.A.F. Fraga,L.M.S. Margato,S.T.G. Fetal,M.M.F.R. Fraga,R. Ferreira Marques,A.J.P.L. Policarpo,Bruno Guerard,A. Oed,G. Manzini,T.L. van Vuure +9 more
TL;DR: In this paper, the optical readout of the gas electron multiplier (GEM) operated with a gaseous mixture suitable for the detection of thermal neutrons: 3 He-CF4.
Journal ArticleDOI
The GEM scintillation in He–CF4, Ar–CF4, Ar–TEA and Xe–TEA mixtures
M.M.F.R. Fraga,F.A.F. Fraga,S.T.G. Fetal,L.M.S. Margato,R. Ferreira Marques,A.J.P.L. Policarpo +5 more
TL;DR: In this paper, the spectral distribution of the light produced in a gas electron multiplier (GEM) is analyzed and the mechanisms associated with the process of light production are considered. And the authors also report on the energy resolution obtained with low-energy X-ray photons.
Journal ArticleDOI
Advances in detectors for single crystal neutron diffraction
J. C. Buffet,J.-F. Clergeau,R.G. Cooper,J. Darpentigny,A. De Laulany,Claude Fermon,S.T.G. Fetal,F.A.F. Fraga,Bruno Guerard,R. Kampmann,A. Kastenmueller,G.J. Mc Intyre,G. Manzin,Flora Meilleur,F. Millier,Nigel J. Rhodes,László Rosta,Erik Schooneveld,Graham C. Smith,Hiroshi Takahashi,P. Van Esch,T.L. van Vuure,K. Zeitelhack +22 more
TL;DR: The multi-blade Microstrip Gas Chamber (MSGC) as mentioned in this paper is a gas counter with radial MSGC plates, providing a partitioning of the gas volume and a segmentation of the signal readout.
Journal ArticleDOI
Luminescence and imaging with gas electron multipliers
F.A.F. Fraga,L.M.S. Margato,S.T.G. Fetal,M.M.F.R. Fraga,R. Ferreira Marques,A.J.P.L. Policarpo +5 more
TL;DR: In this paper, the luminescence process in the GEM and a summary of its applications are presented, as well as the operation of GEMs in photon counting mode.
Journal ArticleDOI
Performance of an optical readout GEM-based TPC
L.M.S. Margato,F.A.F. Fraga,S.T.G. Fetal,M.M.F.R. Fraga,E.F.S. Balau,A. Blanco,R. Ferreira Marques,A.J.P.L. Policarpo +7 more
TL;DR: In this paper, the operation of a GEM-based small TPC using an optical readout was reported. But the accuracy of the track angle, length and charge deposition measurements were not evaluated.