Remotely controlled mirror of variable geometry for small‐angle x‐ray diffraction with synchrotron radiation

摘要: A total‐reflecting mirror of 120‐cm length was designed and built to focus synchrotron radiation emanating from the electron–positron storage ring at Stanford Linear Accelerator Center (SPEAR). The reflecting surface is unpolished float glass. bending tilt mechanism allows very fine control curvature selectability critical angle for wavelengths ranging 0.5 3.0 A. Elliptical used minimize aberrations. placed asymmetrically onto ellipse so as achieve a tenfold demagnification source. reduces nonelastic deformation (flow) minimizes strains stresses in glass despite its length. Special design features assure stability focused image. intensity shorter wavelength harmonics by factor approximately 100.