Electron spectrometers are used on a range of scientific equipment, including particle accelerators, transmission electron microscopes, and astronomical satellites.OverviewAn electron spectrometer is a device used to perform different forms of and. Electron spectrometers may determine electron energy based on, retarding potential (effectively a ), resonant collision or curvature in a deflecting field (magnetic or electric). An electros. The in the solution of motion in a magnetic or electric system with rotational symmetry leads to radial focusing onto a mean radius. By superposition of a axial focusing is possible while weak. •, for electronic band structure determination•, field of analyzing material surfaces•.