electron multiplier

An electrical component in which a single electron can create a large current flow. Electron multipliers are used in photomultipliers, particle detectors, and electron microscopes.

◆ In tube electron multipliers , electrons released from a cathode collide with a dynode or anode, causing release of more electrons through secondary emission ; this process is generally repeated through a number of stages to achieve great amplification of current. Electron multipliers are also called electron amplifiers.