This specialized beam line is under development at the Synchrotron Radiation Center, University of Wisconsin. The project includes the construction of a new, high-efficiency undulator based beam line on the storage ring, Aladdin, to be used to address the science and technology of high-temperature superconducting materials. The beam line will have higher angle and energy resolution capabilities than presently available in the United States, and will provide a complementary capability to the efforts now under development in France, Germany, and Japan. This beam line will be ideally suited for high-resolution photoelectron spectroscopic studies of high-temperature superconductors. The source will be a specially designed undulator. The radiation will be dispersed by a Wadsworth monochromator, with the grating being the only optical element in the photon path. The monochromatic radiation will impinge on a two-hundred and fifty micron size spot on the sample, which typically will be at low temperatures. The photoelectrons will be energy analyzed by a hemispherical capacitor analyzer with a position-sensitive detector on a goniometer. Completion on this beam line is anticipated for late 1993, and will be available to general users about one-fourth of the operating time for broader applications.
