2 NEW INSERTION DEVICES FOR ALADDIN

The Brobeck Division of Maxwell Laboratories, Inc., is designing and b uilding two new insertion devices to be installed in the Aladdin ring at the Synchrotron Radiation Center (SRC), University of Wisconsin-Mad ison. One insertion device is an electromagnetic undulator being built for Iowa State University. It will have a peak magnetic field of 0.12 T and produce photons in the energy range from 15 to 30 eV. The tunin g range is provided by varying the field excitation current. This devi ce has a fixed gap and 14 periods. Magnetic field mapping shows that h igh field quality is being achieved. The second device for SRC is a pu re current-sheet-equivalent material (CSEM) undulator designed to prov ide intense photons in the energy range from 7.5 to 230 eV. This undul ator, which uses Nd-B-Fe magnets, will be installed in a 4-m straight section of the Aladdin ring, and will have 48 full periods with a peak magnetic field of 0.7 T. It will become the source for an intense, hi gh resolution, and variable polarization beamline project. Stringent r equirements on field quality have been established to achieve the desi red radiation performance and to minimize the disturbance to the stora ge ring.