The development of a superconducting 6T wiggler magnet for the Daresbury SRS

The 6-T wiggler is an iron-cored, warm bore, superconducting dipole magnet destined for the SERC Daresbury (UK) Laboratory´s 2-GeV synchrotron radiation source to enhance the available radiation spectrum. The authors describe the major features of the magnet and include a discussion of detailed magnetic and cryogenic tests. The magnet provides a peak field of 6 T on the beam line, which was reached after four training quenches. The design and manufacturing contract for this magnet was started in September 1989 and was preceded by a feasibility study, presented in mid-1988. At the end of the feasibility study the recommendation was for a design incorporating a room temperature beam pipe and soft magnetic iron pole pieces. The magnet was cooled and successfully tested at Daresbury in February 1992. The ease with which reliable operation at 6 T was obtained and the good comparison between predicted and measured magnetic fields were results arising from the works tests.<>