The synchrotron radiation is dispersed by a monochromator that has a resolving power up to 1000 and 108 to 1012 photons/sec/0.1% bandpass peaking at ~ 100 eV. Thin filters are suppressed the radiation from the monochromator in the higher harmonics. The wavelength scale is established by the geometry of the monochromator and the absorption edges of the filters. Two elements (e.g. grating and mirror) are precisely translated and rotated by computer control while maintaining fixed entrance and exit slits. Gratings are selected without breaking vacuum and cover from 1 keV through the visible. The radiation is 90% polarized with the electric field vector in the plane of the storage ring.