The nonlinear effects of fringe fields in HLS

Author

Wang, Lin ; Liu, Zuping ; Feng, Guangyao ; Zhang, Shancai ; Li, Weimin ; Xu, Hongliang

Author_Institution

USTC, Hefei

fYear

2007

fDate

25-29 June 2007

Firstpage

1061

Lastpage

1063

Abstract

The main body of HLS (Hefei Light Source) is an 800 MeV electron storage ring, whose circumference is about 66 m. As a typical small ring, although the sextupole fields for correction of chromaticities are relatively weak, there still exist strong nonlinear fields coming from fringe fields of dipole and quadrupole magnets. In this paper, the effects of fringe fields on chromaticities and tune shifts with amplitude were discussed and calculated for HLS storage ring. Under the low injection energy, the tune shifts with amplitude coming from fringe fields are one of important sources of transverse Landau damping, which is main stabilizing mechanism for HLS ring.

Keywords

accelerator magnets; electron accelerators; light sources; particle beam dynamics; particle beam injection; storage rings; synchrotron radiation; synchrotrons; Hefei Light Source; dipole magnet; electron storage ring; fringe fields; injection energy; nonlinear effects; nonlinear fields; quadrupole magnet; sextupole fields; synchrotron radiation; transverse Landau damping; tune shifts; Algebra; Damping; Electrons; High level synthesis; Light sources; Magnetic analysis; Magnetic fields; Magnets; Maxwell equations; Storage rings;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2007. PAC. IEEE

Conference_Location

Albuquerque, NM

Print_ISBN

978-1-4244-0916-7

Type

conf

DOI

10.1109/PAC.2007.4440982

Filename

4440982