Abstract
A new generation of synchrotron radiation light sources covering the VUV, soft-x-ray, and hard-x-ray spectral regions is under construction in several countries. They are designed specifically to use periodic magnetic undulators and low-emittance electron or positron beams to produce high-brightness, near-diffraction-limited synchrotron radiation beams. Some of the novel features of the new sources will be discussed along with the characteristics of the radiation produced, with emphasis on the Advanced Light Source, a third-generation, 1.5-GeV storage ring optimized for undulator use. A brief introduction to the physics of high-brightness undulator radiation will be presented. This will be followed by a discussion of some of the unique challenges faced by users of these new sources, including high beam power, partial coherence, harmonics, optics contamination, and the unusual spectral and angular properties of undulator radiation.
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