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Observation of electron-induced characteristic x-ray and bremsstrahlung radiation from a waveguide cavity

dc.contributor.authorVassholz, Malte
dc.contributor.authorSalditt, Tim
dc.date.accessioned2021-05-18T09:51:15Z
dc.date.available2021-05-18T09:51:15Z
dc.date.issued2021de
dc.identifier.urihttp://resolver.sub.uni-goettingen.de/purl?gs-1/17810
dc.description.abstractWe demonstrate x-ray generation based on direct emission of spontaneous x-rays into waveguide modes. Photons are generated by electron impact onto a structured anode target, which is formed as an x-ray waveguide or waveguide array. Both emission of characteristic radiation and bremsstrahlung are affected by the changes in mode density induced by the waveguide structure. We investigate how the excited modal pattern depends on the positions of the metal atoms and the distance of the focused electron beam with respect to the waveguide exit side. We compare the results to synchrotron-excited fluorescence. We then discuss how x-ray generation in waveguides can be used to increase the brilliance and directional emission of tabletop x-ray sources, with a corresponding increase in the spatial coherence. On the basis of the Purcell effect, we lastly show that the gain of emission into waveguide modes is governed by the quality factor of the waveguide.de
dc.description.sponsorshipOpen-Access-Publikationsfonds 2020
dc.language.isoengde
dc.rightsopenAccess
dc.rightsNamensnennung-Nicht-kommerziell 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subject.ddc530
dc.titleObservation of electron-induced characteristic x-ray and bremsstrahlung radiation from a waveguide cavityde
dc.typejournalArticlede
dc.identifier.doi10.1126/sciadv.abd5677
dc.type.versionpublishedVersionde
dc.relation.eISSN2375-2548
dc.bibliographicCitation.volume7de
dc.bibliographicCitation.issue4de
dc.bibliographicCitation.firstPageeabd5677de
dc.type.subtypejournalArticle
dc.description.statuspeerReviewedde
dc.bibliographicCitation.journalScience Advancesde


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