Electron multiplier

An electron multiplier (continuous dynode electron multiplier) is a vacuum-tube structure that multiplies incident charges. In a process called secondary emission, a single electron can, when bombarded on metal (or PbO coated surface) induce emission of roughly 1 to 3 electrons. If an electric potential is applied between this metal plate and yet another, the emitted electrons will accelerate to the next metal plate and induce secondary emission of still more electrons. This can be repeated a number of times, resulting in a large shower of electrons all collected by a metal anode, all having been triggered by just one. Therefore, another name for electron multipliers is avalanching ion detector. 12 stages of acceleration will usually give a gain in current of 10 million.

“Electron multiplier” is strongly related to:

Secondary emission Electron Photomultiplier Phototube Lucas cell Zoltán Lajos Bay Faraday cup Daly detector Microchannel plate detector Scintillation counter Geiger counter Electric potential Electric current Mass spectrometry

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