Development of an undulator for the SRS

Abstract An undulator radiation source will be installed and tested in the SRS during 1983, based on a periodic permanent magnet system. The source properties have been optimised after extensive calculations of the spectral characteristics and their dependence on the detailed three-dimensional design of the undulator magnet. Consideration has also been given to the diagnostic requirements during commissioning studies, when the SRS could be operated at energies as low as 450 MeV. A beam line and work station will now be designed to make use of the increases in source brightness in the range 20–50 A at the normal SRS operating energy of 2 GeV, allowing microscopy imaging studies to be undertaken at high resolution.