High-order dispersion suppression for FFAG-based optics

R. Fenning, S. MacHida, D. Kelliher, A. Khan, R. Edgecock

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The resurgence of interest in FFAG type magnets has motivated the desire for high-order dispersion suppression to aid the development of dispersion-free straight sections to currently circular designs. In scaling FFAGs, dispersion suppression can only be achieved over a limited momentum range and breaks down as high-order chromatic aberration terms become significant. However by breaking the scaling law and varying the individual multipole components, these can be compensated for and a design for high-order dispersion suppression achieved. This paper presents a process for doing so and discusses the impact on beta functions, as well as the effect of magnet positioning errors.

Original languageEnglish
Article numberP05011
JournalJournal of Instrumentation
Issue number5
Publication statusPublished - 23 May 2012
Externally publishedYes


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