Development and Implications of ISOL Target-Materials with High-Carbon content for Short-Lived Radioactive Isotope Beam Production

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dc.contributor.authorCervantes Smith, Marla Stephanie
dc.contributor.supervisorGottberg, Alexander
dc.contributor.supervisorKarlen, Dean
dc.date.accessioned2024-01-04T01:05:03Z
dc.date.copyright2023en_US
dc.date.issued2024-01-03
dc.degree.departmentDepartment of Physics and Astronomyen_US
dc.degree.levelDoctor of Philosophy Ph.D.en_US
dc.description.abstractIn the Isotope Separation On-Line (ISOL) method, a high-energy particle beam strikes a target, inducing nuclear reactions that produce isotopes. After releasing from the target by diffusion, the isotopes are ionized, and separated by mass. ISAC, TRIUMF's ISOL facility, delivers RIBs to experiments on nuclear astrophysics, nuclear physics, particle physics, and material science. The Advanced Rare IsotopE Laboratory (ARIEL) is under construction to expand TRIUMF's scientific capabilities with the development of two additional ISOL target systems for TRIUMF. This expansion entails a greater demand for target material, promoting the research and development of new targets tailored for enhanced isotope release and improved resilience under high-power beam irradiation. This work presents the research and development towards reducing several limitations of the current ISOL-target paradigm. A new method for synthesizing UCx targets has been developed. Now UCx targets are synthesized eight times faster than before while complying with the required micrometric particle size and high open porosity to promote isotope release. The reduction in production time complies with ARIEL's future target material demand, and it has relieved personnel and equipment, allowing the development of a novel graphite-composite target. Both targets have been characterized and submitted online for isotope delivery to experiments. Their performance has been studied and related to microstructure and thermal properties. Both targets are now established and regularly operated at ISAC-TRIUMF and will be used in ARIEL. Furthermore, temperature investigations of both targets, have resulted in an analytical and a finite element model to predict their temperature during operation. Moreover, to further improve the performance of the targets, the implications of operating target materials with high carbon content have been investigated. Strategies are proposed for further learning about carbon penetration, the resulting target ovens' corrosion, and its prevention.en_US
dc.description.scholarlevelGraduateen_US
dc.identifier.urihttp://hdl.handle.net/1828/15778
dc.languageEnglisheng
dc.language.isoenen_US
dc.rightsAvailable to the World Wide Weben_US
dc.subjectISOLen_US
dc.subjectISOL targeten_US
dc.subjectUCxen_US
dc.subjectGraphite compositeen_US
dc.subjectRadioactive Ion Beamen_US
dc.subjectTRIUMFen_US
dc.subjectARIELen_US
dc.subjectISACen_US
dc.subjectTantalum embrittlementen_US
dc.subjectRadiotracer release studiesen_US
dc.subjectOnline isotope releaseen_US
dc.subjectTarget materialen_US
dc.subjectRelease efficiencyen_US
dc.subjectTarget thermal analysisen_US
dc.subjectIsotope diffusionen_US
dc.titleDevelopment and Implications of ISOL Target-Materials with High-Carbon content for Short-Lived Radioactive Isotope Beam Productionen_US
dc.typeThesisen_US

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