Noun
English Wikipedia has an article on:dynodeWikipedia
dynode (plural dynodes)
(physics) Any of a series of electrodes within a photomultiplier tube.
The continuous dynode was resistive, and its ends were connected to enough voltage to create repeated cascades of electrons. Source: Internet
Those electrons are accelerated toward another dynode at a higher voltage, releasing more secondary electrons; as many as 15 such stages provide a huge amplification. Source: Internet