electron multiplier

noun

Electronics.

a vacuum tube containing a number of dynodes that serve to amplify the flow of electrons from the cathode by means of secondary emission.

electron multiplier

noun

physics a device for amplifying and measuring a flux of electrons. Each electron hits an anode surface and releases secondary electrons that are accelerated to a second surface; after several such stages a measurable pulse of current is obtained

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.

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Word History and Origins

Origin of electron multiplier¹

First recorded in 1935–40

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Example Sentences

Examples have not been reviewed.

The proper adjustment is then made by a mechanism in which the photoelectric current is amplified one quintillion times by a Zworykin electron multiplier.

From Time Magazine Archive

electron microscope electron-neutrino

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