Double-crystal monochromator beam line on the Aladdin 1-GeV storage ring

Publisher Website
Google Scholar
Abstract
We report the design, construction, and performance of a soft x‐ray beam line with accessible photon energy 0.8–4.0 keV at the Synchrotron Radiation Center, University of Wisconsin–Madison. The beam line features an ultrahigh‐vacuum (UHV) compatible high‐precision double‐crystal monochromator (DCM) covering Bragg angles 12°–72°, which was designed and built at the Physical Science Laboratory (PSL), University of Wisconsin–Madison. The monochromatic x rays are focused by a bent cylindrical mirror (Ni‐coated fused silica, located 7.5 m from the source) into the experimental chamber (located 5.5 m from the mirror) down to a spot less than 1 mm(h)×3 mm(v). During the initial runs, the DCM used a pair of InSb(111) crystals and covered photon energy 1.75–3.7 keV. At the silicon K edge (1840 eV), the beam line delivered about 4×1011 photons/s with stored electron beam at 100 mA at 1 Gev, among the most intense and stable sources currently available at this energy. The energy resolution is about 0.9 eV at the Si K edge.

This publication has 15 references indexed in Scilit: