Magnetic design of a 3 T time-varying elliptical wiggler

• Published in: Journal of magnetism and magnetic materials 2000-02, Vol.209 (1-3), p.173-175
• Main Authors: CHANG, C. H, WANG, C, HWANG, C. S, HUANG, M. H, FAN, T. C, CHEN, H. H, LIN, F. Y
• Format: Article
• Language: English
• Subjects: Applied sciences; Electrical engineering. Electrical power engineering; Electromagnets; Exact sciences and technology; Generation of magnetic fields; magnets; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Magnetic components, instruments and techniques; Physics; Various equipment and components
• ISSN: 0304-8853
• DOI: 10.1016/S0304-8853(99)00679-4

This work describes the design of an elliptical wiggler capable of producing highly circular polarized light in the energy range of 1-10 keV. The time-varying elliptical wiggler consists of vertical and horizontal periodic magnet structures with a period length of 25 cm. The vertical magnetic field is generated by a hybrid permanent magnet structure with peak field strength of 3 T at a minimum gap of 12 mm. An iron core electromagnetic circuit that is shifted longitudinally by one-quarter period length relative to the vertical structure produces the AC horizontal magnetic field; it has peak field strength of 600 G. The right and left elliptically polarized light can be switched at a rate of 1 Hz. The magnetic field maximization and the spectral performance optimization are also presented.