DESIGN AND CONSTRUCTION OF THE FIRST IN-VACUUM WIGGLER FOR THE BSRF

A new in-vacuum wiggler of hybrid type was constructed for Beijing Synchrotron Radiation Facility (BSRF) .It is a 2.0 Tesla (while operation at the gap of 12mm), which will provide high flux in the hard X-ray region and will mainly be used for the high pressure diffraction experiments. The magnetic structure design, the mechanical structure design, the vacuum system and the results of magnetic field measurement of the invacuum wiggler are described in this paper. Also given is the characteristics of the synchrotron radiation of this wiggler and its compares to the current operation wigglers.