Commissioning a second superconducting wiggler in the Daresbury SRS

A second superconducting wiggler magnet has now been installed on the SRS at Daresbury. This three pole device generates a field of 6 T on the beam axis and greatly extends the range of useful synchrotron radiation on the light source. The magnet properties are briefly reviewed, together with the necessary and major modifications that have had to be made to the SRS to accommodate this powerful addition to the lattice. Initial commissioning trials in the Spring of 1993 are described and a comparison made with expected influence on the beam behaviour. Successful operation has been demonstrated, including simultaneous excitation with the earlier 5 T wiggler