Beamline Optics

Overview

The beamline is sourced by a linear polarization undulator (LPU38). It has two branches, namely, the mono beam branch and the white/pink beam branch. The mono beam branch uses the cPGM layout, has two gratings with energy resolving power of 100k @400 eV and 5k @ 867 eV. Endstation 3 at the end of the mono branch holds the Mach-Zehnder interferometer used to measure the ultra high-energy resolving power from the monochromator. It also supports the ptychographic characterization of quantum materials. The white/pink beam branch holds two endstations. One is for thermal management research on SR instrumentation, the other is for soft X-ray optics research. The beam directly from the source incident on the endstation for thermal management research. It then goes through a heat load chopper and two harmonic rejection mirrors before it reaches the endstation for X-ray optics research. The beam (ranging from 250 eV to 1000 eV) with the intrinsic bandwidth is used for this endstation.