annular dark-field detector
annular dark-field detector
An annular detector with an inner diameter of ～3 mm and an outer diameter of ～8 mm, which is used for obtaining a high-angle annular dark-field scanning transmission electron microscope (HAADF-STEM) image. The "annular dark-field (ADF) detector" of a phosphor screen or a YAG scintillator receives scattered electrons and converts them into a light signal. The light signal is directed to a PMT through a light pipe and converted into an electric signal, and the electric signal is amplified.
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