Ad-hoc Magnetic Materials Center Seminar
October 20, 2006, 13:30
7th floor seminar room, Sengen
Physics and applications of the ultrafast laser assisted atom probe tomography
B. Gault
Since 2004, we have been working in the development of a laser assisted atom probe. The aim was to achieve in the conception of an instrument with an enhanced field of view, with a high mass resolution, and able to analyse conducting or non-conducting material with the same performances. In a first step we had to demonstrate that field evaporation under ultrafast laser illumination was possible. Then the physical mechanism responsible for the field evaporation had to be characterised. In this presentation, we will present, on the one hand, the physical phenomenon that can be involved in ultrafast laser assisted atom probe. On the other hand the design and performances of the new laser assisted wide angle tomographic atom probe will be discussed, and illustrated by experimental results.