You searched for: “photomultiplier tube
electron multiplier phototube, electron-multiplier phototube, multiplier phototube, photoelectric electron-multiplier tube, photomultiplier, photomultiplier tube
A phototube with one or more dynodes (electrodes the primary function of which is secondary emission of electrons) between its photocathode (photosensitive surface that emits electrons when exposed to light or other suitable radiation) and the output electrode.

The electron stream from the photocathode is reflected off each dynode in sequence, with a secondary emission adding electrons to the stream at each reflection.

This entry is located in the following unit: electro-, electr-, electri- (page 50)