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This static gantry enables magnetically driven azimuthal angle selection via tailored fields rather than mechanical rotation, yet its practical feasibility requires rigorous simulation-based evaluation. Our approach utilizes full 3D magnetic field modeling in Opera3D coupled with a custom phase-ellipse tracking program. This integrated workflow captures realistic 3D fringe-field effects and quantitatively evaluates the optical limits driven by momentum spread and boundary edge-focusing. By identifying these primary limitations, this platform provides the requirements and a practical foundation to guide the development and optimization of future static gantry designs.<\/jats:p>","DOI":"10.1007\/s12194-026-01120-3","type":"journal-article","created":{"date-parts":[[2026,8,31]],"date-time":"2026-08-31T13:08:19Z","timestamp":1788181699000},"page":"1802-1809","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["3D magnetic field modeling and beam optics validation for a static gantry system"],"prefix":"10.1007","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0009-0000-7647-9415","authenticated-orcid":false,"given":"H.","family":"Zhao","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M.","family":"Fukuda","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A.","family":"Gerbershagen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"H.","family":"Kanda","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K. 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No results or figures are generated by AI. All scientific content is conceived, validated, and is fully accountable by the authors. No generative AI images are used.","order":3,"name":"Ethics","label":"Use of AI-assisted tools","group":{"name":"EthicsHeading","label":"Declarations"}}]}}