Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/4560
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dc.contributor.authorFraga, F. A. F.-
dc.contributor.authorMarques, R. Ferreira-
dc.contributor.authorGonçalves, J. A. C.-
dc.contributor.authorGonçalo, J. R.-
dc.contributor.authorPolicarpo, A. J. P. L-
dc.contributor.authorEijk, C. W. E. van-
dc.contributor.authorHollander, R. W.-
dc.contributor.authorBerg, F. van den-
dc.date.accessioned2008-09-01T11:09:11Z-
dc.date.available2008-09-01T11:09:11Z-
dc.date.issued1998en_US
dc.identifier.citationNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 419:2-3 (1998) 460-463en_US
dc.identifier.urihttp://hdl.handle.net/10316/4560-
dc.description.abstractOne of the main drawbacks of the use of microgap structures when used at high pressure (6 bar) at high count rates (~106 s-1 mm-2) is the limited maximum safe gain at which they can be operated. The use of a preamplification device such as the GEM (gas electron multiplier) can overcome this limitation; however, secondary space charge effects due to charge accumulation at the non-metallic surfaces cannot be neglected and should be minimised. These positive charges are due to the intrinsic multiplication of the GEM device and also to the drift of ions from the anode of the main detector. In this study we present data on the variation of the positive ion collection by the drift electrode versus drift field at several pressures up to 6 bar using a Kr-CO2 mixture. Data were collected with microgaps having several anode and insulator widths. The influence of the drift field in the pulse rise time is also considered.en_US
dc.description.urihttp://www.sciencedirect.com/science/article/B6TJM-3VHW9D0-1H/1/7e6cb7ab07e3df379a279e38a943af61en_US
dc.format.mimetypeaplication/PDFen
dc.language.isoengeng
dc.rightsopenAccesseng
dc.titleEffect of the drift field on avalanche gain and charge collection in microgap detectors at high pressureen_US
dc.typearticleen_US
item.languageiso639-1en-
item.fulltextCom Texto completo-
item.grantfulltextopen-
crisitem.author.deptFaculdade de Ciências e Tecnologia, Universidade de Coimbra-
crisitem.author.parentdeptUniversidade de Coimbra-
crisitem.author.researchunitLaboratory of Instrumentation and Experimental Particle Physics-
crisitem.author.orcid0000-0002-7028-2651-
Appears in Collections:FCTUC Física - Artigos em Revistas Internacionais
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