A SMALL-ANGLE X-RAY-SCATTERING WORKSTATION FOR NATIONAL LABORATORY FOR SYNCHROTRON LIGHT

A versatile, modular, and high-vacuum compatible small angle x-ray scattering workstation is under construction at National Laboratory for Synchrotron Light. It will use a wiggler source to be installed in the 1.15-GeV UVX2 electron storage ring. The white beam is monochromatized by Bragg reflection using a silicon triangular-shaped, asymmetrically cut and bent crystal. The movements required for theta-rotation, crystal bending, and tilting are performed by an external goniometer and two specially designed translation stages, respectively. The x-ray wavelength will cover the range 1 angstrom < lambda < 2 angstrom and can be varied by theta rotation of the whole monochromator crystal and housing and 2-theta rotation of the monochromatic beam path setup. The monochromator, secondary shutter, slits, sample holder, beam stopper, and detection system are stepping motor driven and computer controlled.