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[{"key": "dc.contributor.advisor", "value": "Papadakis, Philippos", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Moore, Iain", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Liimatainen, Jarkko", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2021-12-17T11:51:54Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2021-12-17T11:51:54Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2021", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/79022", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "MARAn alhaisen energian haara on kehitteill\u00e4 oleva uusi mittauslaitteisto Jyv\u00e4skyl\u00e4n yliopiston Kiihdytinlaboratorion MARA-massaseparaattorille. T\u00e4ss\u00e4 ty\u00f6ss\u00e4 suunniteltiin ja simuloitiin ioniohjain MARAn alhaisen energian haaralle SIMION-ohjelmistolla. Ioniohjaimen teht\u00e4v\u00e4 on kuljettaa ionit MARAn polttotasolla sijaitsevalta kaasukammiolta kohti dipolimagneettia radiotaajuisilla kvadrupoleilla ja Einzel-linssisysteemill\u00e4. Dipolimagneetilla ionit massaseparoidaan ja ohjataan kohti mittauslaitteistoja. SIMION simuloi oletuksena ionien lentoratoja tyhji\u00f6ss\u00e4, mink\u00e4 takia simulointiohjelmaan toteutettiin ionien ja kaasuatomien t\u00f6rm\u00e4yksi\u00e4 simuloivat mallit. Erityisesti ioniohjaimen alussa kaasun paine tulee olemaan niin suuri, ett\u00e4 se vaikuttaa ionien lentoratoihin. 94Ag+1 ioneja simuloitiin sek\u00e4 helium ja argon taustakaasuille. T\u00e4ss\u00e4 ty\u00f6ss\u00e4 esitetyn ioniohjaimen havaittiin saavuttavan yli 80% l\u00e4p\u00e4isytehokkuuden molemmilla taustakaasuilla ja ionisuihkun avaruudellista hajontaa voitiin hallita kiihdytinoptiikan j\u00e4nnitteill\u00e4.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "The ion guide system for the MARA low-energy branch, which is a new facility developed for the mass separator MARA at the Accelerator Laboratory of the University of Jyv\u00e4skyl\u00e4, was designed and simulated with SIMION in this work. The purpose of the ion guide system is to transport the ions from the gas cell at the MARA focal plane towards a dipole magnet by using radio frequency quadrupoles and an einzel lens system. At the dipole magnet the ions will be mass separated and transported to the experimental stations. Ion-gas collision models and gas temperature, pressure and velocity were implemented in the simulation program in order to simulate the ion guide system accurately because SIMION inherently simulates ion trajectories in vacuum and the pressure inside the ion guide system, especially the first part of it, is going to be significant. Simulations were performed for 94Ag+1 ions and for both helium and argon buffer gasses. It was found that the ion guide system design of this work should provide a transmission efficiency above 80% for both background gasses and that the spatial spread of the ion beam at the end of the ion guide system can be controlled via\nthe voltages of the accelerating optics.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Paivi Vuorio (paelvuor@jyu.fi) on 2021-12-17T11:51:54Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2021-12-17T11:51:54Z (GMT). No. of bitstreams: 0\n Previous issue date: 2021", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "60", "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": "MARA low-energy branch", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "SIMION", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "ion guide", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Simulation and design of the ion guide system for the MARA Low-Energy Branch", "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-202112176006", "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": "ydinfysiikka", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "nuclear physics", "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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