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dc.contributor.authorBreskin, A.-
dc.contributor.authorMörmann, D.-
dc.contributor.authorLyashenko, A.-
dc.contributor.authorChechik, R.-
dc.contributor.authorAmaro, F. D.-
dc.contributor.authorMaia, J. M.-
dc.contributor.authorVeloso, J. F. C. A.-
dc.contributor.authorSantos, J. M. F. dos-
dc.identifier.citationNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 553:1-2 (2005) 46-52en_US
dc.description.abstractWe report on the progress in the study of cascaded GEM and GEM/MHSP gas avalanche photomultipliers operating at atmospheric pressure, with CsI and bialkali photocathodes. They have single-photon sensitivity, ns time resolution and good localization properties. We summarize operational aspects and results, with the highlight of a high-gain stable gated operation of a visible-light device. Of particular importance are the results of a recent ion-backflow reduction study in different cascaded multipliers, affecting the detector's stability and the photocathode's lifetime. We report on the significant progress in ion-blocking and provide first results on bialkali-photocathode aging under gas multiplication.en_US
dc.subjectGaseous electron multipliersen_US
dc.subjectGaseous photomultipliersen_US
dc.titleIon-induced effects in GEM and GEM/MHSP gaseous photomultipliers for the UV and the visible spectral rangeen_US
item.fulltextCom Texto completo-
item.grantfulltextopen- de Ciências e Tecnologia, Universidade de Coimbra- de Coimbra- for Instrumentation, Biomedical Engineering and Radiation Physics-
Appears in Collections:FCTUC Física - Artigos em Revistas Internacionais
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