Resonant Soft X-ray Scattering End Station (Open Access)
The RSXS end station can perform time-resolved pump-probe resonant soft X-ray scattering (diffraction) to study the temporal dynamics of the charge/spin/orbital orders in solid state materials. This end station has a base pressure better than 10-8 torr, and a high vacuum compatible sample loading/transfer system is installed for the rapid change of samples. A motorized sample stage allows the sample to be rotated azimuthally about its surface normal (Φ) and be pivoted in the vertical plane (χ). This sample stage (also shown in the following figure) is thermally contacted to a temperature control system, which consists of a liquid Helium cryostat and a heater, allowing the sample temperature to be changed from 15 K to 400 K. There are total six degrees of freedom for the sample: three translational (x, y, z from manipulator) and three rotational degrees of freedom (Θ,χ,Φ) with a differentially pumped rotary seal.
This end station has the following detectors: two avalanche photodiodes, one thermopile detector (for detecting IR radiation) and will have a fast area detector in the near future (note: the FCCD in the image is currently not installed). These detectors are mounted on a fully motorized detector stage inside the vacuum chamber, which allows those detectors to move in both horizontal (360 degrees) & vertical (90 degrees) scattering planes. Such capability can be used to efficiently search for superlattice reflections over the full range of reciprocal space. X-ray absorption (XAS) can also be performed by measuring the fluorescent yield and total electron yield (sample-to-ground current).
