Abel, C.C.AbelAyres, N. J.N. J.AyresBaker, T.T.BakerBan, G.G.BanBison, G.G.BisonBodek, K.K.BodekBondar, V.V.BondarCrawford, C. B.C. B.CrawfordPIN-JUNG CHIUChanel, E.E.ChanelChowdhuri, Z.Z.ChowdhuriDaum, M.M.DaumDechenaux, B.B.DechenauxEmmenegger, S.S.EmmeneggerFerraris-Bouchez, L.L.Ferraris-BouchezFlaux, P.P.FlauxGeltenbort, P.P.GeltenbortGreen, K.K.GreenGriffith, W. C.W. C.Griffithvan der Grinten, M.M.van der GrintenHarris, P. G.P. G.HarrisHenneck, R.R.HenneckHild, N.N.HildIaydjiev, P.P.IaydjievIvanov, S. N.S. N.IvanovKasprzak, M.M.KasprzakKermaidic, Y.Y.KermaidicKirch, K.K.KirchKoch, H.-C.H.-C.KochKomposch, S.S.KomposchKoss, P. A.P. A.KossKozela, A.A.KozelaKrempel, J.J.KrempelLauss, B.B.LaussLefort, T.T.LefortLemiere, Y.Y.LemiereLeredde, A.A.LereddeMohanmurthy, P.P.MohanmurthyPais, D.D.PaisPiegsa, F. M.F. M.PiegsaPignol, G.G.PignolQuéméner, G.G.QuéménerRawlik, M.M.RawlikRebreyend, D.D.RebreyendRies, D.D.RiesRoccia, S.S.RocciaRozpedzik, D.D.RozpedzikSchmidt-Wellenburg, P.P.Schmidt-WellenburgSchnabel, A.A.SchnabelSeverijns, N.N.SeverijnsVirot, R.R.VirotWeis, A.A.WeisWursten, E.E.WurstenWyszynski, G.G.WyszynskiZejma, J.J.ZejmaZsigmond, G.G.Zsigmond2025-08-062025-08-062019-04-15https://scholars.lib.ntu.edu.tw/handle/123456789/731034Magnetic-field uniformity is of the utmost importance in experiments to measure the electric dipole moment of the neutron. A general parametrization of the magnetic field in terms of harmonic polynomial modes is proposed, going beyond the linear-gradients approximation. We review the main undesirable effects of nonuniformities: depolarization of ultracold neutrons and Larmor frequency shifts of neutrons and mercury atoms. The theoretical predictions for these effects were verified by dedicated measurements with the single-chamber neutron electric-dipole-moment apparatus installed at the Paul Scherrer Institute.journal article10.1103/physreva.99.042112