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dc.contributor.authorKnápek, Alexandr
dc.contributor.authorGrmela, Lubomír
dc.contributor.editorPihera, Josef
dc.contributor.editorSteiner, František
dc.date.accessioned2012-11-07T06:50:55Z
dc.date.available2012-11-07T06:50:55Z
dc.date.issued2011
dc.identifier.citationElectroscope. 2011, č. 2, EEICT 2011.cs
dc.identifier.issn1802-4564
dc.identifier.urihttp://147.228.94.30/images/PDF/Rocnik2011/Cislo2_2011/r5c2c7.pdf
dc.identifier.urihttp://hdl.handle.net/11025/605
dc.format5 s.cs
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherZápadočeská univerzita v Plzni, Fakulta elektrotechnickács
dc.relation.ispartofseriesElectroscopecs
dc.rightsCopyright © 2007-2010 Electroscope. All Rights Reserved.en
dc.subjectstudená emisecs
dc.subjectkatodycs
dc.subjecttenké vrstvycs
dc.subjectpryskyřicecs
dc.subjectproudová stabilitacs
dc.titleStability analysis of cold-emission cathodes with epoxy coatingen
dc.typekonferenční příspěvekcs
dc.typeconferenceObjecten
dc.rights.accessopenAccessen
dc.type.versionpublishedVersionen
dc.description.abstract-translatedIn this paper, the current stability analysis was performed on the cold-emission cathode covered by a thin epoxy film. Non-destructive spectroscopic method, which is based on measuring current fluctuations, has been used to determine cathodes’ quality, which directly influents the stability of the emission current. Our investigations have been performed on tungsten cathodes with extra-sharp nanotip, operating under the HV (high-vacuum)conditions, usually in vacuums of 10-5 Pa order. All the cathodes used for this experiment have been prepared in our lab by improved electrochemical etching method, which is based on the presence of increased surface tension allowing reaching the geometrically precise shape of the cathodes’ tip. After the two phase etching method, the tip was cleared and covered by thin epoxy film, which prevents the tip to be destroyed by ion bombardment that is caused by ions attracted back on to the cathode surface. A comprehensive investigation was carried out to determine particular noise sources and to compare clean cathodes with the resin-coated one, in order to describe the influence of the oxide and dielectric epoxy layer on to the emission current stability. Spectra obtained, for various emission currents at different voltages, are described and explained. The results suggest that the resin-layer changes cathode performance and extends its durability.en
dc.subject.translatedcold emissionen
dc.subject.translatedcathodesen
dc.subject.translatedthin filmsen
dc.subject.translatedepoxyen
dc.subject.translatedcurrent stabilityen
dc.type.statusPeer-revieweden
Appears in Collections:Číslo 2 - EEICT 2011 (2011)
Číslo 2 - EEICT 2011 (2011)

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