title: Normalized fifth-order spherical aberration coefficients derived from a Gaussian trajectory on rotationally symmetrical magnetic lenses.
abstract: This paper reports normalized fifth-order spherical aberration coefficients C(5s)/R derived from Gaussian trajectory for rotationally symmetrical magnetic lenses, where S/D (the polepiece gap-width/bore-diameter ratio) is in the range 0.20-2.00, and k(2) (the lens-intensity parameter) is 0.10-100. It is noted that the normalized fifth-order spherical-aberration coefficient C(5s)/R changes its sign within the given parameter ranges.
authors.affiliation: Key Laboratory of Optoelectronics Information Science & Technology, EMC, Institute of Optoelectronics & Precision Instrument, Tianjin University, China.
authors.forename: C
authors.initials: C
authors.lastname: Li
authors.forename: C-J
authors.initials: CJ
authors.lastname: Mu
authors.forename: Y-M
authors.initials: YM
authors.lastname: Zhang
authors.forename: X-M
authors.initials: XM
authors.lastname: Chen
authors.forename: T-G
authors.initials: TG
authors.lastname: Liu