PLS bending magnet x-ray beamline 3C2

Abstract

The design of the 3C2 beamline at the Pohang Light Source (PLS) is described. The beamline is designed for x-ray scattering studies with x-ray photons over an energy range of 4–12 keV. A cylindrical Pt-coated silicon mirror intercepts a photon beam up to 3 mrad at a distance of 16 m from a source point and focuses the beam sagittally at the sample position with a magnification of 1:1. For the vertical focusing it will be dynamically bent by the mirror holder. A double-crystal monochromator of two Si(111) crystals with a fixed-exit beam geometry provides monochromatic photons and is located in front of the experimental hutch to reduce the motion of the beam position. The hutch is equipped with a four-circle diffractometer and various photon detection electronics for x-ray scattering experiments.