X-Ray Diffraction

Reflectometer including Mo-Ka source.

Six circle (z-axis) diffractometer.

Responsible: Dr. Vedran Vonk

The DESY Nanolab operates two separate X-ray set-ups. The first is a dedicated X-ray reflectometer, equipped with a molybdenum X-ray tube and adapted multilayer optics, giving a line focus at the sample position. The second set-up (currently under construction) is a full 6-circle diffractometer, which is used in combination with a copper tube source. Here, the multilayer optics focuses in two dimensions, resulting in a point focus at the sample position. Both diffractometers are placed within lead shielding hutches, which are built from material left after dismantling DORIS.

Reflectometer

Characteristics
Mo-Kalpha
• spot size: 12x0.3 mm2 (HxV)
• divergence: 0.4 mrad (V)
• type: theta-2theta scans
• control software: SPEC
• detectors: Point detector or Strip detector (Mythen)

Six-circle Diffractometer

Characteristics
Cu-Kalpha
• spot size: 0.25x0.25 mm2 (HxV)
• divergence: 5x5 mrad2 (HxV)
• type: full reciprocal space access
• control software: SPEC
• detectors: Point detector or Strip detector (Mythen)

Contact: Dr. Vedran Vonk Email: verdran.vonk@desy.de