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dc.contributor.authorLapin, R. L.
dc.contributor.authorSkalyga, V. A.
dc.contributor.authorIzotov, I.
dc.contributor.authorRazin, S. V.
dc.contributor.authorShaposhnikov, R. A.
dc.contributor.authorVybin, S. S.
dc.contributor.authorBokhanov, A. F.
dc.contributor.authorKazakov, M. Yu.
dc.contributor.authorTarvainen, O.
dc.date.accessioned2020-03-03T10:13:49Z
dc.date.available2020-03-03T10:13:49Z
dc.date.issued2020
dc.identifier.citationLapin, R. L., Skalyga, V. A., Izotov, I., Razin, S. V., Shaposhnikov, R. A., Vybin, S.S., Bokhanov, A. F., Kazakov, M. Y., & Tarvainen, O. (2020). Study of gasdynamic electron cyclotron resonance plasma vacuum ultraviolet emission to optimize negative hydrogen ion production efficiency. <i>Review of Scientific Instruments</i>, <i>91</i>(1), Article 013517. <a href="https://doi.org/10.1063/1.5128313" target="_blank">https://doi.org/10.1063/1.5128313</a>
dc.identifier.otherCONVID_34509229
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/68030
dc.description.abstractNegative hydrogen ion sources are used as injectors into accelerators and drive the neutral beam heating in ITER. Certain processes in low-temperature hydrogen plasmas are accompanied by the emission of vacuum ultraviolet (VUV) emission. Studying the VUV radiation, therefore, provides volumetric rates of plasma-chemical processes and plasma parameters. In the past, we have used gasdynamic ECR discharge for volumetric negative ion production and investigated the dependencies between the extracted H− current density and various ion source parameters. It was shown that it is possible to reach up to 80 mA/cm2 of negative ion current density with a two electrode extraction. We report experimental studies on negative hydrogen ion production in a high-density gasdynamic ECR discharge plasma consisting of two simple mirror traps together with the results of VUV emission measurements. The VUV-power was measured in three ranges—Lyα, Lyman band, and molecular continuum—varying the source control parameters near their optima for H− production. It was shown that the molecular continuum emission VUV power is the highest in the first chamber while Lyα emission prevails in the second one. Modifications for the experimental scheme for further optimization of negative hydrogen ion production are suggested.en
dc.format.mimetypeapplication/pdf
dc.languageeng
dc.language.isoeng
dc.publisherAmerican Institute of Physics
dc.relation.ispartofseriesReview of Scientific Instruments
dc.rightsIn Copyright
dc.subject.othergasdynamic electron cyclotron resonance
dc.subject.otherplasma vacuum ultraviolet emission
dc.subject.othernegative hydrogen ion production
dc.titleStudy of gasdynamic electron cyclotron resonance plasma vacuum ultraviolet emission to optimize negative hydrogen ion production efficiency
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-202003032252
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.description.reviewstatuspeerReviewed
dc.relation.issn0034-6748
dc.relation.numberinseries1
dc.relation.volume91
dc.type.versionpublishedVersion
dc.rights.copyright© 2020 Authors.
dc.rights.accesslevelopenAccessfi
dc.subject.ysoplasmafysiikka
dc.subject.ysosyklotronit
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p10238
jyx.subject.urihttp://www.yso.fi/onto/yso/p15295
dc.rights.urlhttp://rightsstatements.org/page/InC/1.0/?language=en
dc.relation.doi10.1063/1.5128313
jyx.fundinginformationThis work was supported by the grant of Russian Science Foundation (Project No. 19-12-00377).


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