ADF（エーディーエフ）検出器

annular dark-field detector

[目次：検出系]

高角度散乱暗視野（走査透過電子顕微鏡）像を得るのに用いられる円環状(内径～3mm、外径～8mm）の検出器。蛍光板またはYAGを用いて散乱電子を光に変え、ライトパイプを通して光電子増倍管で電気信号に変換し、増幅する。

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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