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dc.contributor.authorTarvainen, Olli
dc.contributor.authorToivanen, Ville
dc.contributor.authorKomppula, Jani
dc.contributor.authorKalvas, Taneli
dc.contributor.authorKoivisto, Hannu
dc.date.accessioned2016-01-25T12:21:53Z
dc.date.available2016-01-25T12:21:53Z
dc.date.issued2014
dc.identifier.citationTarvainen, O., Toivanen, V., Komppula, J., Kalvas, T., & Koivisto, H. (2014). Transverse distribution of beam current oscillations of a 14 GHz electron cyclotron resonance ion source. <i>Review of Scientific Instruments</i>, <i>85</i>(2), Article 02A909. <a href="https://doi.org/10.1063/1.4826539" target="_blank">https://doi.org/10.1063/1.4826539</a>
dc.identifier.otherCONVID_23705323
dc.identifier.otherTUTKAID_62034
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/48455
dc.description.abstractThe temporal stability of oxygen ion beams has been studied with the 14 GHz A-ECR at JYFL (University of Jyvaskyla, Department of Physics). A sector Faraday cup was employed to measure the distribution of the beam current oscillations across the beam profile. The spatial and temporal characteristics of two different oscillation “modes” often observed with the JYFL 14 GHz ECRIS are discussed. It was observed that the low frequency oscillations below 200 Hz are distributed almost uniformly. In the high frequency oscillation “mode,” with frequencies >300 Hz at the core of the beam, carrying most of the current, oscillates with smaller amplitude than the peripheral parts of the beam. The results help to explain differences observed between the two oscillation modes in terms of the transport efficiency through the JYFL K-130 cyclotron. The dependence of the oscillation pattern on ion source parameters is a strong indication that the mechanisms driving the fluctuations are plasma effects.
dc.language.isoeng
dc.publisherAmerican Institute of Physics
dc.relation.ispartofseriesReview of Scientific Instruments
dc.subject.othertransverse distribution
dc.subject.otherbeam current oscillations
dc.titleTransverse distribution of beam current oscillations of a 14 GHz electron cyclotron resonance ion source
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201601251261
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.contributor.oppiaineFysiikkafi
dc.contributor.oppiainePhysicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2016-01-25T04:15:04Z
dc.type.coarjournal article
dc.description.reviewstatuspeerReviewed
dc.relation.issn0034-6748
dc.relation.numberinseries2
dc.relation.volume85
dc.type.versionpublishedVersion
dc.rights.copyright© 2013 AIP Publishing LLC. Published in this repository with the kind permission of the publisher.
dc.rights.accesslevelopenAccessfi
dc.relation.doi10.1063/1.4826539


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