The synchrotron light source ROSY

ROSY, a 3rd generation synchrotron radiation source, has been proposed to be built at the Research Center Rossendorf in the region Dresden of the country Saxony in Germany. ROSY will be dedicated to material research and industrial application. The critical wavelength of the synchrotron radiation spectrum has to be 0.15 nm corresponding to a critical photon energy of 8.4 keV. Electrons with an energy of 3 GeV deflected in a 1.4 T bending magnet provide this spectrum. It is proposed to use a "modified multiple bend achromat (MBA)" lattice in order to get a compact machine as well as a low emittance. For 3 GeV an emittance smaller than 30 nm rad can be obtained. With a fourfold symmetry and two larger straight sections within the achromatic arcs the circumference is 148.1 m. 23% of the circumference can be used for installing insertion devices. The natural chromaticities and the compensating sextupole strengths are moderate, the dynamic aperture as well as the momentum acceptance are sufficient. >