Beamlines | I10 - RASOR end station

Reflectivity and Advanced Scattering from Ordered Regimes (RASOR)

RASOR diffractometerRASOR is a soft x-ray diffractomer, equipped with a full polarisation analyser, and low temperature capabilities. It is equipped with a Janis liquid helium cryostat enabling the sample to reach the temperature of 12 K. It can also be used to study non-isotropic scattering using an azimuthal (phi) stage, in the form of a piezo rotator.

Diffraction Circles

Diffraction circles

RASOR has two main rotation circles, theta and two theta that both provide a full range of motion. In addition there is a chi rotation, however this is limited to +/- 4 deg. The sample position can be translated within these rotations by +/- 20mm perpendicular to the diffraction plane, and +/- 5mm crossed within the plane. In addition a phi rotation (infinite) can be mounted at the sample position.

Detection

The scattered beam can be detected using a photodiode or a channeltron (a single channel electron multiplier).

The detector arm is equipped with a polarisation analyser. The polarisation analyser can be used with multilayers that are optimised specifically for each element of interest. These elements are O (K edge), Mn, Fe, Co and Ni (L2,3 edges).

Sample Mounts

There are a number of sample mounts available optimised for different use:

  • Very low temperature
  • Piezo rotation stage providing a phi rotation

Most of the sample mounts allow multiple sample position, such that it is possible to mount a number of samples in the diffractometer simultaneously, and translate from one to the next.