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[{"key": "dc.contributor.advisor", "value": "Tarvainen, Olli", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "L\u00e4tti, Sakari", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2016-12-21T15:07:04Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2016-12-21T15:07:04Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2016", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1645206", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/52508", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "T\u00e4ss\u00e4 ty\u00f6ss\u00e4 tutkitaan negatiivisen vetyionil\u00e4hteen plasman tuottaman ultraviolettis\u00e4teilyn\nja ionil\u00e4hteen tuottaman negatiivisen vetyionisuihkun intensiteetin v\u00e4list\u00e4\nkorrelaatiota. Ty\u00f6ss\u00e4 l\u00f6ydettiin korrelaatio VUV-spektrin tiettyjen aallonpituusalueiden\nintensiteettien v\u00e4lisen suhteen ja Faraday-kupilla mitatun suihkuintensiteetin\nv\u00e4lill\u00e4. Korrelaatio ei kuitenkaan ole yksiselitteinen ja p\u00e4tee ainoastaan rajoitetussa\npainealueessa.\nVetyplasman molekylaarisen emission Lyman-vy\u00f6n spektrin ja suihkun korrelaation\ntarkastelusta huomattiin, ett\u00e4 elektronisen perustilan vibronisten viritystilojen\n10 ja 11 tuoton suhde korkeampien viritystilojen tuottoon on olennainen negatiivisten\nvetyionien tuoton kannalta. H\u2013 -ionien tuotantoprosessissa on useita pullonkauloja,\nmutta kyseisten viritystilojen tuotto ei vaikuttaisi olevan dominoiva tekij\u00e4.\nLis\u00e4ksi tarkastellaan H2-molekyylin elektronisen eksitaation j\u00e4lkeist\u00e4 vibronisen\ntilan elinaikaa. T\u00e4m\u00e4 tehd\u00e4\u00e4n vertaamalla kahta oletusta. Ensimm\u00e4isen mukaan vibroninen\ntila ehtii relaksoitua t\u00e4ydellisesti ja toisen mukaan virittynyt tila purkautuu\nv\u00e4litt\u00f6m\u00e4sti, niin etteiv\u00e4t molekyylin ytimet ehdi lainkaan liikkua. Ty\u00f6ss\u00e4 osoitettiin,\nett\u00e4 t\u00e4ysin relaksoitunut malli vastaa mitattuja spektrej\u00e4 paljon paremmin kuin\nv\u00e4litt\u00f6m\u00e4n purkautumisen malli.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "In this study correlation between ultraviolet radiation produced by negative hydrogen\nion source plasma and intensity of H\u2013 ion beam extracted from it was studied.\nCorrelation between intensities of certain parts of VUV spectrum and ion beam\nintensity measured by Faraday cup was found. Still, the correlation is not absolute\nand is valid only with selected ion source pressure.\nWhen correlation between Lyman band spectrum of molecular hydrogen plasma\nand ion beam intensity was studied, it was found that high production of electronic\nground state vibronic states 10 and 11, when compared to production of higher\nvibronic states, play a crucial role in the production of negative hydrogen ions.\nProduction process of H\u2013 ions includes multiple bottlenecks and therefore production\nof these vibronic states probably is not a dominant factor.\nIn addition lifetime of vibronic state of H2 molecule after electronic state excitation\nwas studied. This was done by comparing two assumptions. According to first, the\nvibronic state has a long time to relax and the second postulates that the excited\nstate decays immediately so the nucleus have no time to move. It was shown that\nthe relaxed model correlates better to acquired experimental results when compared\nto the immediate decay model.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Sakari L\u00e4tti (satalatt) on 2016-12-21 15:07:03.921497. Form: Pro gradu -lomake (https://kirjasto.jyu.fi/julkaisut/julkaisulomakkeet/pro-gradu-lomake). JyX data: [jyx_publishing-allowed (fi) =True]", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by jyx lomake-julkaisija (jyx-julkaisija.group@korppi.jyu.fi) on 2016-12-21T15:07:04Z\nNo. of bitstreams: 2\nURN:NBN:fi:jyu-201612215221.pdf: 6785763 bytes, checksum: 502d675eadb7601522b2d4ff216c05ed (MD5)\nlicense.html: 4845 bytes, checksum: 259537e111ff91faf4781c420907ab16 (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2016-12-21T15:07:04Z (GMT). No. of bitstreams: 2\nURN:NBN:fi:jyu-201612215221.pdf: 6785763 bytes, checksum: 502d675eadb7601522b2d4ff216c05ed (MD5)\nlicense.html: 4845 bytes, checksum: 259537e111ff91faf4781c420907ab16 (MD5)\n Previous issue date: 2016", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "1 verkkoaineisto (95 sivua)", "language": null, "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.format.mimetype", "value": "application/pdf", "language": null, "element": "format", "qualifier": "mimetype", "schema": "dc"}, {"key": "dc.language.iso", "value": "fin", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "Vety", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "plasma", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "ultravioletti", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "spektri", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "ionil\u00e4hde", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "vibroninen viritys", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "LIISA-ionil\u00e4hteen vetyplasman VUV-spektrin ja H \u0304 -ionisuihkun intensiteetin korrelaatio", "language": null, "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-201612215221", "language": null, "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Matemaattis-luonnontieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Fysiikan laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Physics", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Fysiikka", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Physics", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.date.updated", "value": "2016-12-21T15:07:05Z", "language": null, "element": "date", "qualifier": "updated", "schema": "dc"}, {"key": "yvv.contractresearch.funding", "value": "0", "language": null, "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "dc.type.coar", "value": 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"subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "plasma (kaasu)", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.format.content", "value": "fulltext", "language": null, "element": "format", "qualifier": "content", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}, {"key": "dc.type.okm", "value": "G2", "language": null, "element": "type", "qualifier": "okm", "schema": "dc"}]
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