electron multiplier

American  

noun

Electronics.

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

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electron multiplier British  

noun

1. 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

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electron multiplier Scientific  

1. 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.

2. ◆ 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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Etymology

Origin of electron multiplier

First recorded in 1935–40

Example Sentences

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