Laser transient gratings

Transient grating measurements are an excellent tool for studying the elastic and thermal transport properties of micron-thin material layers. Interference of two short pump laser beams generates a spatially periodic grating pattern on the sample surface. Absorption of the lights causes the formation of a temperature grating. Rapid thermal expansion also launches two counter propagating surfaceContinue reading “Laser transient gratings”

Fusion: Energy of the Future?

Nuclear fusion has the potential to provide a sustainable, environmentally friendly, reliable energy source. One of the main obstacles to commercial fusion energy is the availability of sufficiently resilient materials. Components in the first wall of a fusion reactor will be exposed to extreme temperatures, intense irradiation and ion bombardment. Tungsten and tungsten alloys areContinue reading “Fusion: Energy of the Future?”

X-Ray Vision at the Atomic Scale

Atomic scale defects play a key role in determining the mechanical and physical properties of material systems. In metals and alloys, defects such as dislocations control deformation and failure behaviour; in semiconductor devices they can be detrimental to electrical performance. Transmission electron microscopy (TEM) transformed our ability to understand and better control atomic scale defectsContinue reading “X-Ray Vision at the Atomic Scale”

High Energy Transmission Laue

High Energy Transmission Laue (HETL) is a new synchrotron X-ray diffraction technique we have recently developed. It allows the lattice distortion of individual grains within polycrystalline engineering components to be probed. Because it uses much higher photon energies than conventional micro-beam Laue diffraction, larger, real-life engineering components could be measured. Our research focuses on refiningContinue reading “High Energy Transmission Laue”