A superconducting ondulator for synchrotron radiation light

An ondulator to produce synchrotron radiation light has been designed and built at SACLAY for the "LURE" Laboratory at ORSAY (France). A magnet with a very short period was required with a number of periods as high as possible to increase the brightness of the source. For this reason superconducting coils have been used in order to reduce their size. 92 coils have been made for the 23 period ondulator with a wavelength λ
0
of 40 mm. This light source whose design began in 1978 has been in operation since february 1980 on the "ACO" electron storage ring.