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dc.contributor.authorKomppula, J.
dc.contributor.authorTarvainen, O.
dc.contributor.authorKalvas, T.
dc.contributor.authorKoivisto, H.
dc.contributor.authorMyllyperkiö, P.
dc.contributor.authorToivanen, V.
dc.date.accessioned2019-08-01T11:33:53Z
dc.date.available2019-08-01T11:33:53Z
dc.date.issued2019
dc.identifier.citationKomppula, J., Tarvainen, O., Kalvas, T., Koivisto, H., Myllyperkiö, P., & Toivanen, V. (2019). A study of VUV emission and the extracted electron-ion ratio in hydrogen and deuterium plasmas of a filament-driven H−/D− ion source. <em>Physics of Plasmas</em>, 26, 7, 073517. <a href="https://doi.org/10.1063/1.5095475">doi:10.1063/1.5095475</a>
dc.identifier.otherCONVID_32197213
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/65185
dc.description.abstractVacuum ultraviolet (VUV) emission diagnostics for studying differences of electron impact processes in hydrogen and deuterium plasmas are presented. The method is applied to study a filament driven multicusp arc discharge negative ion source by comparing the VUV-emission intensities of different emission bands and extracted currents of H−/D− ions and electrons. It was found that the ratio of coextracted electrons to extracted ions is four times higher for deuterium than for hydrogen. No significant differences of the VUV-spectra or volumetric rates of ionization, excitation, production of high vibrational states, and dissociation were found between the plasmas of the two isotopes. The volumetric rates of these electron impact processes are presented for both discharges. It is concluded that in the filament ion source, the observed difference of H−/D− production through dissociative electron attachment is due to different diffusion rates across the magnetic fields of the tandem-type discharge chamber rather than the production rate of ground state molecules at their vibrational levels.en
dc.format.mimetypeapplication/pdf
dc.languageeng
dc.publisherAIP Publishing LLC
dc.relation.ispartofseriesPhysics of Plasmas
dc.rightsIn Copyright
dc.subject.otherplasmafysiikka
dc.subject.otherisotoopit
dc.subject.otherisotopes
dc.subject.otherion sources
dc.subject.otherplasma diagnostics
dc.subject.othervibrational states
dc.subject.otherelectron impact ionization
dc.subject.otherelectric discharges
dc.subject.otherplasma spectroscopy
dc.subject.otherelectron impact emission spectroscopy
dc.subject.othervacuum ultraviolet radiation
dc.subject.otherdiffusion rate
dc.titleA study of VUV emission and the extracted electron-ion ratio in hydrogen and deuterium plasmas of a filament-driven H−/D− ion source
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201908013747
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.description.reviewstatuspeerReviewed
dc.format.pagerange7
dc.relation.issn1070-664X
dc.relation.volume26
dc.type.versionpublishedVersion
dc.rights.copyright© 2019 Author(s).
dc.rights.accesslevelopenAccessfi
dc.format.contentfulltext
dc.rights.urlhttp://rightsstatements.org/page/InC/1.0/?language=en
dc.relation.doi10.1063/1.5095475


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