Second-order theory of helical hexapole lens of infinite length
Abstract
Expressions which can be used to calculate the focusing coefficients applicable to the interior regions (no fringe fields) of magnetic helical hexapole lenses of infinite length have been derived through second-order. It is shown that the helical hexapole has better focusing properties than the non-helical case. Expressions for the aberration coefficients are derived and, for appropriate value of the twisted angle, the helical hexapole reduces aberrations compared to the non-helical case. The numerical examples of a magnetic helical hexapoles in the case of a 25 MeV proton and 250 GeV electron beams are performed. (c) 2007 Elsevier B.V. All rights reserved.
Keywords:
helical hexapole / aberration / beam opticsSource:
Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 2007, 263, 2, 483-487
DOI: 10.1016/j.nimb.2007.06.016
ISSN: 0168-583X
WoS: 000250661100024
Scopus: 2-s2.0-34848845215
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Institution/Community
VinčaTY - JOUR AU - Toprek, Dragan PY - 2007 UR - https://vinar.vin.bg.ac.rs/handle/123456789/3230 AB - Expressions which can be used to calculate the focusing coefficients applicable to the interior regions (no fringe fields) of magnetic helical hexapole lenses of infinite length have been derived through second-order. It is shown that the helical hexapole has better focusing properties than the non-helical case. Expressions for the aberration coefficients are derived and, for appropriate value of the twisted angle, the helical hexapole reduces aberrations compared to the non-helical case. The numerical examples of a magnetic helical hexapoles in the case of a 25 MeV proton and 250 GeV electron beams are performed. (c) 2007 Elsevier B.V. All rights reserved. T2 - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms T1 - Second-order theory of helical hexapole lens of infinite length VL - 263 IS - 2 SP - 483 EP - 487 DO - 10.1016/j.nimb.2007.06.016 ER -
@article{ author = "Toprek, Dragan", year = "2007", abstract = "Expressions which can be used to calculate the focusing coefficients applicable to the interior regions (no fringe fields) of magnetic helical hexapole lenses of infinite length have been derived through second-order. It is shown that the helical hexapole has better focusing properties than the non-helical case. Expressions for the aberration coefficients are derived and, for appropriate value of the twisted angle, the helical hexapole reduces aberrations compared to the non-helical case. The numerical examples of a magnetic helical hexapoles in the case of a 25 MeV proton and 250 GeV electron beams are performed. (c) 2007 Elsevier B.V. All rights reserved.", journal = "Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms", title = "Second-order theory of helical hexapole lens of infinite length", volume = "263", number = "2", pages = "483-487", doi = "10.1016/j.nimb.2007.06.016" }
Toprek, D.. (2007). Second-order theory of helical hexapole lens of infinite length. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 263(2), 483-487. https://doi.org/10.1016/j.nimb.2007.06.016
Toprek D. Second-order theory of helical hexapole lens of infinite length. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms. 2007;263(2):483-487. doi:10.1016/j.nimb.2007.06.016 .
Toprek, Dragan, "Second-order theory of helical hexapole lens of infinite length" in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 263, no. 2 (2007):483-487, https://doi.org/10.1016/j.nimb.2007.06.016 . .