First SOLEIL insertion devices are ready to produce photons for users

SOLEIL is the French 2.75 GeV synchrotron radiation light source of low emittance under construction near Paris. It will provide high intensity photons covering a wide spectral range from the IR to the hard X-rays. The storage ring commissioning started in late May 2006, and the first photons on the first beamline were observed in September 2006. The first set of Insertion Devices (ID), either already installed before the ring commissioning or to be installed within the first year of operation of the machine, consists of one 640 mm period and three 256 mm period electromagnetic elliptical undulators, three 80 mm period APPLE-II type undulators, and three 20 mm period in-vacuum undulators. All these IDs make use of a wide panoply of technical solutions for generating various types of magnetic fields. Magnetic and conceptual designs were performed by SOLEIL, and the technical realization was carried out together with different manufacturers. The design specificities of the different types of IDs, as well as the results of the shimming and magnetic measurements performed at SOLEIL are reported.