Magnetic design and field measurements of a VUV-undulator for MAX-lab

Author

Meinander, T. ; Sarakontu, M.

Author_Institution

Tech. Res. Centre of Finland, Espoo, Finland

Volume

24

Issue

2

fYear

1988

fDate

3/1/1988 12:00:00 AM

Firstpage

1219

Lastpage

1221

Abstract

The magnetic design of a permanent magnet undulator for generation of vacuum-ultraviolet (VUV) radiation in a 550-MeV storage ring is described. The undulator utilizes ferrite permanent magnets in a hybrid configuration. The periodic magnetic field of the undulator is realized by arrays of permanent magnets and iron poles situated symmetrically on the upper and lower side of the vacuum chamber containing the electron beam (i.e. the hybrid configuration). Magnetic-field measurement methods and results obtained in the finished device are reviewed. From measurements of the peak field values for various gap settings, it was concluded that ferrite is not a good choice for high-uniformity hybrid undulators.

Keywords

beam handling equipment; ferrites; light sources; magnetic field measurement; permanent magnets; storage rings; strontium compounds; synchrotron radiation; undulator radiation; 550 MeV; Fe poles; MAX-lab; SrFe₁₂O₁₉ permanent magnets; VUV-undulator; arrays of permanent magnets; ferrite permanent magnets; field measurements; generation of vacuum-ultraviolet; high-uniformity hybrid undulators; hybrid configuration; iron poles; magnetic design; periodic magnetic field; permanent magnet undulator; storage ring; Electrons; Ferrites; Magnetic field measurement; Magnetic fields; Magnetic flux; Magnetic materials; Permanent magnets; Storage rings; Synchrotron radiation; Undulators;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.11454

Filename

11454