{"id":{"repo_id":"sask","oai_identifier":"oai:harvest.usask.ca:10388/17262"},"canonical_url":"https://search.dev.ndltd.org/etd/sask/oai:harvest.usask.ca:10388/17262","repository":{"repo_id":"sask","name":"University of Saskatchewan","base_url":"https://harvest.usask.ca/server/oai/request"},"display":{"title":"Magnetostatic Modelling and Measurement for Particle Dynamics of a Magnetic Energy Filter","abstract":"This thesis discusses the modelling and measurement of electromagnetic fields in a filter designed to selectively filter low-energy electrons from beams produced by electron sources. Two electron source configurations—based on a direct current (DC) 0.5 MeV electron gun and a 3.5 MeV radio frequency (RF) electron gun available at the Canadian Light Source (CLS) test laboratory—were examined. Magnetostatic simulations were conducted using two-dimensional modelling software, and the results were validated against experimental measurements using a magnetic energy filter system at CLS. This process enabled the calibration of magnetic field settings for optimized performance in the test laboratory. The primary settings of interest were calculated, which are the operating currents needed for each of the magnets within. Particle tracking software was subsequently employed to simulate a beam of electrons traversing the energy filter, allowing for the generation of trajectory plots and evaluation of the momentum spread before and after filtration. The calculated operating parameters for the magnetic filter were as follows: for the DC electron gun, the dipole magnets required a current of 0.697 A, while the entrance and exit focusing quadrupoles operated at 0.195 A, the center focusing quadrupole at 0.229 A, and the defocusing quadrupoles at −0.256 A. For the RF electron gun, the dipole current was found to be 4.88 A, with the corresponding quadrupole currents at 1.37 A, 1.61 A, and 1.80 A. Both configurations successfully achieved a reduction in the momentum spread by eliminating low-energy electrons; however, the RF setup allowed substantially higher beam current densities, up to 9.14 A/mm2. Overall, the findings demonstrated that the modelled filter effectively refined the electron beam qualities for both electron guns. The methodology was shown to be adaptable to other sources with beam energies below 11.9 MeV, within the linear operating range of the model.","abstract_html":"This thesis discusses the modelling and measurement of electromagnetic fields in a filter designed to selectively filter low-energy electrons from beams produced by electron sources. Two electron source configurations—based on a direct current (DC) 0.5 MeV electron gun and a 3.5 MeV radio frequency (RF) electron gun available at the Canadian Light Source (CLS) test laboratory—were examined. Magnetostatic simulations were conducted using two-dimensional modelling software, and the results were validated against experimental measurements using a magnetic energy filter system at CLS. This process enabled the calibration of magnetic field settings for optimized performance in the test laboratory. The primary settings of interest were calculated, which are the operating currents needed for each of the magnets within. Particle tracking software was subsequently employed to simulate a beam of electrons traversing the energy filter, allowing for the generation of trajectory plots and evaluation of the momentum spread before and after filtration. The calculated operating parameters for the magnetic filter were as follows: for the DC electron gun, the dipole magnets required a current of 0.697 A, while the entrance and exit focusing quadrupoles operated at 0.195 A, the center focusing quadrupole at 0.229 A, and the defocusing quadrupoles at −0.256 A. For the RF electron gun, the dipole current was found to be 4.88 A, with the corresponding quadrupole currents at 1.37 A, 1.61 A, and 1.80 A. Both configurations successfully achieved a reduction in the momentum spread by eliminating low-energy electrons; however, the RF setup allowed substantially higher beam current densities, up to 9.14 A/mm2. Overall, the findings demonstrated that the modelled filter effectively refined the electron beam qualities for both electron guns. The methodology was shown to be adaptable to other sources with beam energies below 11.9 MeV, within the linear operating range of the model.","abstract_has_math":false,"creators":["Shomachuk, Terryl"],"institution":"University of Saskatchewan","degree_name":"Master of Science (M.Sc.)","degree_level":"Masters","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":[],"advisors":["Boland, Mark"],"committee_chairs":[],"committee_members":["Xiao, Chijin","Xiaodong, Liang","Toohey, Mathew"],"year":2025,"date_issued":"2025-09-11","date_published":"2025-09-11","updated_at":"2026-07-24T04:27:13Z","subjects":["Accelerator","Electron","Synchrotron","Beam Dynamics","Simulation","Momentum Filtering"],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/10388/17262","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Boland, Mark"]},{"key":"dc:contributor.committeemember","label":"Committee Member","values":["Xiao, Chijin","Xiaodong, Liang","Toohey, Mathew"]},{"key":"dc:creator","label":"Author","values":["Shomachuk, Terryl"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2025-09-11T19:19:51Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2025-09-11T19:19:51Z"]},{"key":"dc:date.issued","label":"Date","values":["2025-09-11"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science (M.Sc.)"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Saskatchewan"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Accelerator","Electron","Synchrotron","Beam Dynamics","Simulation","Momentum Filtering"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/10388/17262"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["This thesis discusses the modelling and measurement of electromagnetic fields in a filter designed to selectively filter low-energy electrons from beams produced by electron sources. Two electron source configurations—based on a direct current (DC) 0.5 MeV electron gun and a 3.5 MeV radio frequency (RF) electron gun available at the Canadian Light Source (CLS) test laboratory—were examined. Magnetostatic simulations were conducted using two-dimensional modelling software, and the results were validated against experimental measurements using a magnetic energy filter system at CLS. This process enabled the calibration of magnetic field settings for optimized performance in the test laboratory. The primary settings of interest were calculated, which are the operating currents needed for each of the magnets within. Particle tracking software was subsequently employed to simulate a beam of electrons traversing the energy filter, allowing for the generation of trajectory plots and evaluation of the momentum spread before and after filtration. The calculated operating parameters for the magnetic filter were as follows: for the DC electron gun, the dipole magnets required a current of 0.697 A, while the entrance and exit focusing quadrupoles operated at 0.195 A, the center focusing quadrupole at 0.229 A, and the defocusing quadrupoles at −0.256 A. For the RF electron gun, the dipole current was found to be 4.88 A, with the corresponding quadrupole currents at 1.37 A, 1.61 A, and 1.80 A. Both configurations successfully achieved a reduction in the momentum spread by eliminating low-energy electrons; however, the RF setup allowed substantially higher beam current densities, up to 9.14 A/mm2. Overall, the findings demonstrated that the modelled filter effectively refined the electron beam qualities for both electron guns. The methodology was shown to be adaptable to other sources with beam energies below 11.9 MeV, within the linear operating range of the model."]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Magnetostatic Modelling and Measurement for Particle Dynamics of a Magnetic Energy Filter"]}]}],"canonical_facts":{"dc:contributor.advisor":["Boland, Mark"],"dc:contributor.committeemember":["Xiao, Chijin","Xiaodong, Liang","Toohey, Mathew"],"dc:creator":["Shomachuk, Terryl"],"dc:date.accessioned":["2025-09-11T19:19:51Z"],"dc:date.available":["2025-09-11T19:19:51Z"],"dc:date.issued":["2025-09-11"],"dc:description.abstract":["This thesis discusses the modelling and measurement of electromagnetic fields in a filter designed to selectively filter low-energy electrons from beams produced by electron sources. Two electron source configurations—based on a direct current (DC) 0.5 MeV electron gun and a 3.5 MeV radio frequency (RF) electron gun available at the Canadian Light Source (CLS) test laboratory—were examined. Magnetostatic simulations were conducted using two-dimensional modelling software, and the results were validated against experimental measurements using a magnetic energy filter system at CLS. This process enabled the calibration of magnetic field settings for optimized performance in the test laboratory. The primary settings of interest were calculated, which are the operating currents needed for each of the magnets within. Particle tracking software was subsequently employed to simulate a beam of electrons traversing the energy filter, allowing for the generation of trajectory plots and evaluation of the momentum spread before and after filtration. The calculated operating parameters for the magnetic filter were as follows: for the DC electron gun, the dipole magnets required a current of 0.697 A, while the entrance and exit focusing quadrupoles operated at 0.195 A, the center focusing quadrupole at 0.229 A, and the defocusing quadrupoles at −0.256 A. For the RF electron gun, the dipole current was found to be 4.88 A, with the corresponding quadrupole currents at 1.37 A, 1.61 A, and 1.80 A. Both configurations successfully achieved a reduction in the momentum spread by eliminating low-energy electrons; however, the RF setup allowed substantially higher beam current densities, up to 9.14 A/mm2. Overall, the findings demonstrated that the modelled filter effectively refined the electron beam qualities for both electron guns. The methodology was shown to be adaptable to other sources with beam energies below 11.9 MeV, within the linear operating range of the model."],"dc:format.mimetype":["application/pdf"],"dc:identifier.uri":["https://hdl.handle.net/10388/17262"],"dc:language.iso":["en"],"dc:subject":["Accelerator","Electron","Synchrotron","Beam Dynamics","Simulation","Momentum Filtering"],"dc:title":["Magnetostatic Modelling and Measurement for Particle Dynamics of a Magnetic Energy Filter"],"dc:type":["Thesis"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Masters"],"thesis:degree_name":["Master of Science (M.Sc.)"],"thesis:institution_name":["University of Saskatchewan"]},"updated_at":"2026-07-24T04:27:13Z"}