Transport phenomena in radioisotope beam production targets
department or school: Science, Faculty of
department or school: Chemistry, Department of
data provider: DSpace
degree campus: UBCV
creator: Egoriti, Luca
issued: 2023-01-05T22:55:55Z
issued: 2022
related degree: Doctor of Philosophy - PhD
degree grantor: University of British Columbia
description: This thesis reports on the development of techniques to better investigate elemental transport phenomena in accelerator-based targets for RIB production through the ISOL method. This development has been carried out at TRIUMF, Canada's particle accelerator centre and home to ISAC-TRIUMF, a leading RIB facility where constant development is key to enable cutting-edge experiments performed in user facilities where the radioactive beams are delivered. Elemental diffusion and effusion in ISOL targets are frequently the major bottleneck for delivering RIBs with desired properties; this thesis focuses on developing systems to improve our understanding of their basic release phenomena, as well as enhance target performance. A major component of this thesis comprises the conceptualization, design, testing and irradiation of a spallation-driven two-step target for isotope production. Unlike every target irradiated for the past 25 years at ISAC, where protons induce nuclear reactions by directly impinging on a target material, this prototype produces spallation neutrons which subsequently induce fission in an annular uranium carbide target, and the reaction products are then extracted as a RIB. Besides unlocking new science with radioisotope beams having previously unavailable characteristics, this methodology brings several advantages for studying transport mechanisms at high-temperatures and in mixed particle fields. Such new features and capabilities provide a new parameter space for better understanding transport phenomena in harsh environments. Additionally, this thesis reports on radiotracer experiments performed on table-top systems and using activated materials, to systematically study the high-temperature diffusion and effusion phenomena in exotic materials and complex geometries. First studies were conducted to characterize the release performance of ISOL target samples, so that the most suited material could be irradiated in the ISAC station. Moreover, the first ex…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/83588
note: Transport Phenomena in Radioisotope Beam Production TargetsbyLuca EgoritiB.Sc. Politecnico di Milano, 2013M.Sc. Politecnico di Milano, 2016A THESIS SUBMITTED IN PARTIAL FULFILLMENTOF THE REQUIREMENTS FOR THE DEGREE OFDoctor of PhilosophyinTHE FACULTY OF GRADUATE AND POSTDOCTORAL STUDIES(Chemistry)The University of British Columbia(Vancouver)December 2022© Luca Egoriti, 2022The following individuals certify that they have read, and recommend to the Faculty of Graduateand Postdoctoral Studies for acceptance, the thesis entitled:Transport Phenomena in Radioisotope Beam Production Targetssubmitted by Luca Egoriti in partial fulfillment of the requirements for the degree of Doctor ofPhilosophy in Chemistry.Examining Committee:W. Andrew MacFarlane, Professor, Department of Chemistry, UBCCo-supervisorAlexander Gottberg, Professor, Department of Physics & Astronomy, UNIVERSITY OF VICTORIACo-supervisorDoug Bryman, Professor, Department of Physics & Astronomy, UBCUniversity ExaminerMark Thachuk, Professor, Department of Chemistry, UBCUniversity ExaminerPierre Delahaye, Research Scientist, GRAND ACCE´LE´RATEUR NATIONAL D’IONS LOURDSExternal examinerAdditional Supervisory Committee Members:Carl A. Michal, Professor, Department of Physics & Astronomy, UBCSupervisory Committee MemberGrenfell N. Patey, Professor, Department of Chemistry, UBCSupervisory Committee MemberTom Troczynski, Professor, Department of Materials Engineering, UBCSupervisory Committee MemberiiAbstractThis thesis reports on the development of techniques to better investigate elemental transport phe-nomena in accelerator-based targets for RIB production through the ISOL method. This developmenthas been carried out at TRIUMF, Canada’s particle accelerator centre and home to ISAC-TRIUMF,a leading RIB facility where constant development is key to enable cutting-edge experiments per-formed in user facilities where the radioactive beams are delivered. Elemental diffusion and effusionin ISOL targets are frequently the…
has type: Thesis/Dissertation
date issued: 2023-05
is shown at: 10.14288/1.0422971
language: eng
degree discipline: Chemistry
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-ShareAlike 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-sa/4.0/
scholar level: Graduate
contributor: MacFarlane, W. Andrew
contributor: Gottberg, Alexander
type: Text
identifier URI: http://hdl.handle.net/2429/83588