Maldonado Millan, Fernando Alejandro2022-07-282022-07-2820222022-07-28http://hdl.handle.net/1828/14082Radioactive isotopes enable advanced medical treatments and the study of nuclear structure, nuclear astrophysics, and fundamental symmetries. TRIUMF, Canada’s Particle Accelerator Centre, generates radioactive isotope beams using the Isotope Separation On-Line method. At TRIUMF, the Forced Electron Beam Induced Arc Discharge (FEBIAD) ion source is used to ionize specific isotopes but often presents limited performance and lower efficiencies compared to other facilities. To investigate the source limitation, elucidate the ionization mechanism, and propose improved and highly efficient sources for upcoming facilities, a combined numerical and experimental campaign has been undertaken. The developed numerical ionization model is able to describe the source as an electron impact ion source that is governed by strong space charge effects. The spatially distributed ionization rate is higher at specific locations of the anode volume, and this has been confirmed experimentally. The validated numerical model has been further used to propose simulation-based optimizations. With the overall optimization, the ionization efficiency for the TRIUMF FEBIAD is expected to increase ten-fold.enAvailable to the World Wide WebRIBCOMSOLISOLFEBIADTRIUMFISACARIELThesisMaldonado Millan F, Day Goodacre T, and Gottberg A. “Multiphysics simulation of a FEBIAD ion source”. Nucl. Instruments Methods Phys. Res. Sect. B Beam Interact. with Mater. Atoms 463 2020, pp. 302–304. doi: 10.1016/j. nimb.2019.04.078.Maldonado Millan F, Babcock C, Day Goodacre T, and Gottberg A. “Anomalous Ionization Regime in a Forced Electron Beam Induced Arc Discharge Ion Source for Singly Charged Radioactive Ion Beam Production”. J. Phys. Conf. Ser. 2244(1) 2022, p. 012074. doi: 10.1088/1742-6596/2244/1/012074.