energy filter
energy filter
Instrument that selects electrons with only specific energies in electrons exiting from a specimen. When only elastically scattered electrons are selected by the energy filter, the background due to inelastically scattered electrons is successfully removed. Thus, a clear microscope image or diffraction pattern is obtained, which provides high-precision structural information. When the absorption-edge energy of a specific element is selected, the corresponding element is mapped. The energy filter is classified into the incolumn type incorporated in the TEM column and the post-column type attached below the column. There are various energy filters with different designs.
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