electron gun

electron gun
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.
[1920-25]

* * *

 electrode structure that produces and may control, focus, and deflect a beam of electrons, as in a television picture tube (see figure—>), where the beam produces a visual pattern on the tube's screen. The source of the electron beam is the cathode, a flat metal support covered with oxides of barium and strontium. When heated by a coil behind the support, these oxides emit electrons, which are drawn toward a positively charged sleeve (first anode) that is contoured to allow the electron beam to flow within the inside diameter. The beam is then electrostatically constricted and collimated by a metal disk with a hole (the control electrode) before it is directed to strike a phosphor-coated screen.

* * *


Universalium. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • electron gun — n. the part of an electron tube, esp. a cathode ray tube, that emits, accelerates, and controls a beam of electrons …   English World dictionary

  • electron gun — ► NOUN ▪ a device for producing a narrow stream of electrons from a heated cathode …   English terms dictionary

  • Electron gun — An electron gun (also called electron emitter) is an electrical component that produces an electron beam that has a precise kinetic energy and is most often used in televisions and monitors which use cathode ray tube technology, as well as in… …   Wikipedia

  • electron gun — noun the electrode that is the source of electrons in a cathode ray tube or electron microscope; consists of a cathode that emits a stream of electrons and the electrostatic or electromagnetic apparatus that focuses it • Hypernyms: ↑electrode •… …   Useful english dictionary

  • electron gun — elektronų prožektorius statusas T sritis fizika atitikmenys: angl. electron gun vok. Elektronenkanone, f; Elektronenstrahler, m rus. электронная пушка, f; электронный прожектор, m pranc. canon à électrons, m; canon électronique, m …   Fizikos terminų žodynas

  • electron gun — electron emitting cathode for directing and focusing a stream of electrons …   English contemporary dictionary

  • electron gun — /əˈlɛktrɒn ˌgʌn/ (say uh lektron .gun) noun a heated cathode which emits electrons, and the surrounding electrostatic or electromagnetic apparatus which controls and focuses the electron stream …  

  • electron gun — noun Date: 1924 an electron emitting cathode and its surrounding assembly (as electromagnets in a cathode ray tube) for directing, controlling, and focusing a beam of electrons …   New Collegiate Dictionary

  • electron gun — elec′tron gun n. elo rtv elm a device consisting of a cathode ray tube and a surrounding electrostatic or electromagnetic apparatus, which emits, focuses, and accelerates a stream of electrons(elec′tron beam ) …   From formal English to slang

  • electron gun — noun Any device that produces a stream of electrons, especially a narrow stream that is focused onto a phosphor screen …   Wiktionary

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”