VULCAN - Engineering Materials Diffractometer
VULCAN with the multiaxial loadframe on the sample stage.
VULCAN is designed for deformation, phase transformation, residual stress, texture, and microstructure studies. Load frames, furnaces, battery chargers, and other auxiliary equipment for in situ and time-resolved measurements are integrated in the instrument. As a time-of-flight diffractometer at the world's most intense pulsed, accelerator-based neutron source, VULCAN provides rapid volumetric mapping with a sampling volume of 1 mm3 and a measurement time of minutes for common engineering materials. In extreme cases, VULCAN has the ability to study kinetic behaviors in sub-second times.
Instrument Specifications
VULCAN Schematic.
- Time-of-flight diffractometer.
- Selectable chopper speed and bandwidth: 60 Hz, 1.44 Å; 30 Hz, 2.88 Å; 20 Hz, 4.32 Å.
- Sample stage: Rotation: 360°, X,Y, +/-250 mm, Z +/-300 mm. Weight capacity: 2000 kg. Positional precision: < 25 μm for loads < 200 kg; 100 μm for loads between 200 and 2,000 kg.
- Detector: +/-90 position-sensitive detectors (3 modules each side), measures two strain components simultaneoulsy.
- High-intensity and high-resolution exchangeable guides, ~0.5% (HI) and ~0.25% (HR) Δ-d/d resolution.
- Beam size: 2 ~17 mm horizontal and 0.2 ~17 mm vertical incident slit. 2 mm and 5 mm receiving radial collimators.
- Various sample environments enable in situ diffraction measurement (see sample environmnet page for details).
