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[{"key": "dc.contributor.advisor", "value": "Tarvainen, Olli", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Koivisto, Hannu", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Marttinen, Miha", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2018-09-24T11:59:05Z", "language": "", "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2018-09-24T11:59:05Z", "language": "", "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2018", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/59650", "language": "", "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Elektronisyklotroniresonanssi-ionil\u00e4hteill\u00e4 (ECRIS) tuotetaan korkeasti varattuja ione-\r\nja kiihdytinpohjaisen fysiikan tutkimuksen tarkoituksiin. Pitk\u00e4t ionien s\u00e4il\u00f6nt\u00e4ajat ovat\r\nv\u00e4ltt\u00e4m\u00e4tt\u00f6mi\u00e4 korkeasti varattujen ionien tuottamiseksi. T\u00e4ss\u00e4 Pro Gradussa testataan\r\ntransienttimenetelm\u00e4\u00e4 ionien s\u00e4il\u00f6nt\u00e4aikojen arviomiseksi sputteroimalla.\r\n\r\nTutkielmassa esitell\u00e4\u00e4n tarpeellinen tausta plasmafysiikalle, ECR-ionil\u00e4hteelle ominai-\r\nsille plasmailmi\u00f6ille, sek\u00e4 k\u00e4yt\u00e4nn\u00f6n menetelmille ionien tuottamiseksi ECR-plasmassa.\r\nKokeellisessa osiossa esitell\u00e4\u00e4n sputterointiin perustuva transienttimenetelm\u00e4 ionien s\u00e4i-\r\nl\u00f6nt\u00e4aikojen arvioimiseksi ionivirtojen transienttien aikavakioista. Aikavakioiden riippu-\r\nvuus ionil\u00e4hteen operointiparametreist\u00e4 analysoidaan nojaten teoreettiseen taustaan, ja\r\nsen havaitaan sopivan ionien s\u00e4hk\u00f6staattiseen s\u00e4il\u00f6nt\u00e4malliin.\r\n\r\nLis\u00e4ksi ty\u00f6ss\u00e4 tutkitaan ionien tuottoaikoja soveltamalla sputterointimetodia nopeassa\r\nsputteroinnissa. Tuottoaikoja verrataan ionivirtojen saturaatioaikoihin, joita k\u00e4ytet\u00e4\u00e4n\r\ntyypillisesti radioaktiivisten ionisuihkujen tuoton rajakriteerin\u00e4. Havaitaan, ett\u00e4 ionien\r\ntuottoajat ovat merkitt\u00e4v\u00e4sti lyhyempi\u00e4 kuin saturaatioajat, mik\u00e4 on radioaktiivisten\r\nionisuihkujen tuoton kannalta t\u00e4rke\u00e4 havainto.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Electron Cyclotron Resonance Ion Sources (ECRIS) are used for Highly Charged Ion\r\n(HCI) production for accelerator based physics research. A necessary condition for HCI\r\nproduction are long ion confinement times. In this thesis, a transient sputtering method\r\nfor estimating the confinement times is tested.\r\n\r\nIn this thesis, the necessary background of plasma physics, ECRIS-specific theoretical\r\nplasma phenomena, and practicalities of HCI production with the ECRIS are introduced.\r\nIn the experimental section, a transient sputtering method for estimating ion confinement\r\ntimes based on the ion current transient decay times is presented. The parameter dependence of the decay times is analyzed relying on the theoretical background, and found to\r\nbe in accordance with the electrostatic ion confinement model.\r\n\r\nAdditionally, the ion production times are probed by applying the sputtering method\r\nin a fast sputtering experiment. The production times are compared to the ion current\r\nsaturation times, which are typically used as limiting criteria for radioactive ion beam\r\nproduction. It is observed, that the ion production times are significantly shorter than\r\nthe current saturation times, which is an important finding with respect to radioactive\r\nbeam production.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Riitta Pitk\u00e4nen (rpitkane@jyu.fi) on 2018-09-24T11:59:05Z\r\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2018-09-24T11:59:05Z (GMT). No. of bitstreams: 0\r\n Previous issue date: 2018", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "108", "language": "", "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": "eng", "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": "ECRIS", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "ion confinement time", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "ion production", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Transient sputtering method for estimating ion confinement times in ECRIS plasma", "language": "", "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-201809244224", "language": "", "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": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "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": "yvv.contractresearch.funding", "value": "0", "language": "", "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": null, "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.oppiainekoodi", "value": "4021", "language": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ionit", "language": "", "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "plasmafysiikka", "language": "", "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ions", "language": "", "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "plasma physics", "language": "", "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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