To provide an electron multiplier capable of simultaneously loading a plurality of samples and easily recording and checking a specified sample.
An electron multiplier is provided with a sample boundary material 20 that is divided by a boundary part 20a at a channel forming part on a face on which an output electrode of a micro-channel plate 3 is formed and that forms a plurality of sample loading parts. This multiplier is provided with an electronic reflector 7 reflecting an electronic beam B passing between samples 2 or inside of the samples 2 loaded on the sample boundary material 20 and a micro-channel plate 3 taking an electron beam reflected by the electron reflector 7 into that channel 31, multiplying and emitting it. Thereby, by the sample boundary material 20, a plurality of samples can be loaded at one time, and mixing of these samples can be prevented.
OKUMURA KAZUAKI
WATANABE HIROYUKI
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