PERFORMANCE OF THE MULTIPLE EVENTS POSITION-SENSITIVE DETECTOR USED IN THE TOMOGRAPHIC ATOM-PROBE

The tomographic atom probe (TAP) is the first 3D atom probe based arou nd the use of a parallel position encoding system. This contribution w ill be focused on the implementation and the study of the TAP position sensitive detector. In the first part, it will be shown why this dete ctor necessarily has to be sensitive to simultaneous events and the de tector principle will be described. Then performance and limitations o f the TAP will be discussed and related to the detector performance it self. Critical points such as spatial resolution, mass resolution or d etection efficiency will be quantified.