Speaker
Temour Foster
(Queen's University Belfast)
Description
Positron Annihilation Lifetime Spectroscopy (PALS) is one of the most effective material analysis techniques at detecting sub-nanometer defects in materials. Current conventional PALS facilities use positron beams of low keV energies and long durations, resulting in poor penetration depth and durations similar to the annihilation lifetime (~150ps), therefore giving poor resolution. By using laser-driven positrons, tuneable MeV-scale energies can be attained with short durations (~30ps), improving both the resolution and allowing for volumetric studies. Here, preliminary experimental results using taranis at QUB will be shown, along with an outline of future investigations at alfa
Author
Temour Foster
(Queen's University Belfast)
