electron gun

noun Electronics, Television.

a device consisting of the cathode ray tube, which emits electrons, and a surrounding electrostatic or electromagnetic apparatus, which controls, focuses, and accelerates the stream of electrons (electron beam).
Also called gun.

Origin of electron gun

First recorded in 1920–25

Words nearby electron gun

electron affinity, electron camera, electron capture, electron carrier, electron diffraction, electron gun, electron hole, electron lens, electron micrograph, electron microscope, electron multiplier

British Dictionary definitions for electron gun

electron gun

noun

a heated cathode with an associated system of electrodes and coils for producing and focusing a beam of electrons, used esp in cathode-ray tubes

Scientific definitions for electron gun

electron gun

The part of a cathode-ray tube that emits a narrow beam of electrons, consisting of a cathode, control grids, and usually a heater. Electrons are emitted from the cathode, which is typically heated by electric current to give the electrons escape energy. The electrons are then focused into a beam by the electric fields of the control grids.