title: In-vacuum undulators of SPring-8.
abstract: Most of the SPring-8 insertion devices are in-vacuum undulators except for the soft X-ray devices and one elliptical wiggler. The standard-type SPring-8 in-vacuum undulator has a period of 32 mm and a minimum gap of 8 mm. The fundamental radiation energy ranges from 5.2 to 18.5 keV. Three standard in-vacuum undulators are already installed in the ring and are operating without any problems. The magnetic field correction, the vacuum system and the commissioning of the in-vacuum undulators are described in this paper.
authors.affiliation: SPring-8, Kamigori-cho, Ako-gun, Hyogo-ken, 678-12, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Hara
authors.forename: T
authors.initials: T
authors.lastname: Tanaka
authors.forename: T
authors.initials: T
authors.lastname: Tanabe
authors.forename: X M
authors.initials: XM
authors.lastname: Maréchal
authors.forename: S
authors.initials: S
authors.lastname: Okada
authors.forename: H
authors.initials: H
authors.lastname: Kitamura