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dc.contributor.authorKalvas, Taneli
dc.contributor.authorTarvainen, Olli
dc.contributor.authorKomppula, Jani
dc.contributor.authorKoivisto, Hannu
dc.contributor.authorTuunanen, Juha
dc.contributor.authorPotkins, D.
dc.contributor.authorStewart, T.
dc.contributor.authorDehnel, M.
dc.date.accessioned2015-10-26T10:33:39Z
dc.date.available2015-10-26T10:33:39Z
dc.date.issued2016
dc.identifier.citationKalvas, T., Tarvainen, O., Komppula, J., Koivisto, H., Tuunanen, J., Potkins, D., Stewart, T., & Dehnel, M. (2016). Power efficiency improvements with the radio frequency H− ion source. <i>Review of Scientific Instruments</i>, <i>87</i>(2), Article 02B102. <a href="https://doi.org/10.1063/1.4932008" target="_blank">https://doi.org/10.1063/1.4932008</a>
dc.identifier.otherCONVID_25230732
dc.identifier.otherTUTKAID_67436
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/47413
dc.description.abstractCW 13.56 MHz radio frequency-driven H− ion source is under development at the University of Jyväskylä for replacing an existing filament-driven ion source at the MCC30/15 cyclotron. Previously, production of 1 mA H− beam, which is the target intensity of the ion source, has been reported at 3 kW of RF power. The original ion source front plate with an adjustable electromagnet based filter field has been replaced with a new front plate with permanent magnet filter field. The new structure is more open and enables a higher flux of ro-vibrationally excited molecules towards the plasma electrode and provides a better control of the potential near the extraction due to a stronger separation of the main plasma from the plasma electrode. While the original system provided better control over the e− /H − ratio, the new configuration has led to a higher production efficiency of 1 mA H− at 1.75 kW RF power. The latest results and upgrade plans are presented
dc.language.isoeng
dc.publisherAmerican Institute of Physics
dc.relation.ispartofseriesReview of Scientific Instruments
dc.subject.otherion sources
dc.subject.otherpower efficiency
dc.titlePower efficiency improvements with the radio frequency H− ion source
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201510233479
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.contributor.oppiaineKiihdytinlaboratoriofi
dc.contributor.oppiaineAccelerator Laboratoryen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2015-10-23T12:15:10Z
dc.type.coarhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.description.reviewstatuspeerReviewed
dc.relation.issn0034-6748
dc.relation.numberinseries2
dc.relation.volume87
dc.type.versionpublishedVersion
dc.rights.copyright© 2015 AIP Publishing LLC.
dc.rights.accesslevelopenAccessfi
dc.relation.doi10.1063/1.4932008
dc.type.okmA1


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