HIGH FLUX INSERTION DEVICES FOR X-RAY BEAM LINES: AN OPTICAL DESIGN.

Design and use of specialized sources (insertion devices) is becoming commonplace at storage rings. These are high brightness sources that fall into two categories: undulators and wigglers. In this paper an optical design for wiggler beam lines is discussed where the thermal problems, both total power and power density, demand new solutions. The proposed optical solution is based on the ideas of the Kirkpatrick-Baez microscope and multilayer reflectors, to achieve a high throughput-small aberration optical system for scattering and spectroscopy.