光電子増倍管（フォトマル）

photomultiplier tube, PMT

[目次：検出系]

光電管に電子増倍部を組み込んだもので、微弱な光を検出し電気信号に変換し増幅する(×10⁵～10⁶)。SEMの二次電子やHAADFの散乱電子の検出部に使われている。

"Photo multiplier tube (PMT)" consists of a phototube that incorporates an electron multiplier. PMT detects weak light, and converts the light signal into an electric signal, then amplifies the electric signal (×10⁵ to 10⁶). PMT is used for a detector, such as a secondary-electron detector in SEM or HAADF detector for scattered electrons in TEM.

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