A project for on-line remote control of a high-voltage TEM

Abstract

On-line microscopy commenced with demonstrations for biological and SEM applications. For materials science, a project has recently been established to provide users of the NCEM with remote online access to a 1.5MeV Kratos EM-1500 high-voltage transmission electron microscope via existing wide area networks. Within this project we are developing and implementing a set of tools, protocols, and interfaces to bring transmission electron microscopy on-line for collaborative research. Initially applied to the Kratos, the project will provide increased utilization of this unique instrument with its heretofore restricted access due to its sensitive components and demand for sophisticated operator skills. Additionally, the project will provide computer tools for capturing and manipulating real-time audio and video signals. These tools will be integrated into a standardized user interface that may be used for remote access to any transmission electron microscope equipped with a suitable control computer.Dynamic study of a specimen in an electron microscope requires continuous adjustment of specimen position and orientation under the beam, illumination conditions, focus adjustments, and corrections for aberrations, all based upon the video signal coming from the imaging system.