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Performance of an Energy compensated optical Tomographic Atom Probe (EcoTAP)

The 3D atom probe is a quantitative measuring instrument, on a nearly atomic scale [1]. This instrument enables the 3D reconstruction of a small volume of matter probed (typically 10 mm x 10 mm x 50 Nm) of a metallic material (Figure 1) [2]. The sample is prepared in a form of a very sharp tip. Under the effect of high-voltage pulses, the atoms of surface are evaporated by field effect and projected on a position sensitive detector. This detector allows the localization of the impacts in synchronism with the measurement of times of flight.