J Synchrotron Radiat 1998 May 1;5(Pt 3):428-30. Epub 1998 May 1.
LURE, Bâtiment 209D, Université Paris-Sud, 91405 Orsay CEDEX, France, and CEA/DRECAM/SPAM, Bâtiment 522, CE Saclay, 91191 Gif-sur-Yvette CEDEX, France.
A planar/helical crossed overlapped undulator, called OPHELIE, is presented, composed of two identical ten-period (each 25 cm long) crossed undulators whose magnetic fields are produced by electromagnets. Such a design is quite simple, with only one mechanical translational motion, and versatile. After the presentation of the general concept of the crossed undulator and of its actual magnetic design, the expected performances in terms of flux and polarization capabilities are described. Read More