electron-beam gun

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• Electron beam welding — (EBW) is a fusion welding process in which a beam of high velocity electrons is applied to the materials being joined. The workpieces melt as the kinetic energy of the electrons is transformed into heat upon impact, and the filler metal, if used …   Wikipedia

• Electron beam physical vapor deposition — or EBPVD is a form of physical vapor deposition in which a target anode is bombarded with an electron beam given off by a charged tungsten filament under high vacuum. The electron beam causes atoms from the target to transform into the gaseous… …   Wikipedia

• electron tube — an electronic device that consists, typically, of a sealed glass bulb containing two or more electrodes: used to generate, amplify, and rectify electric oscillations and alternating currents. Also called electronic tube. Cf. gas tube, vacuum tube …   Universalium

• 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 microscope — Diagram of a transmission electron microscope A 197 …   Wikipedia

• electron gun — 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… …   Universalium

• electron — n. a stable elementary particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids. Phrases and idioms: electron beam a stream of electrons in a gas or vacuum. electron diffraction …   Useful english dictionary

• 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 spectrometer — In an Electron spectrometer, an incoming beam of electrons is bent with electric or magnetic fields. As higher energy electrons will be bent less by the beam, this produces a spatially distributed range of energies. Electron spectrometers are… …   Wikipedia

• electron microscope — noun a microscope that is similar in purpose to a light microscope but achieves much greater resolving power by using a parallel beam of electrons to illuminate the object instead of a beam of light • Hypernyms: ↑microscope • Hyponyms: ↑field… …   Useful english dictionary

• beam — beamless, adj. beamlike, adj. /beem/, n. 1. any of various relatively long pieces of metal, wood, stone, etc., manufactured or shaped esp. for use as rigid members or parts of structures or machines. 2. Building Trades. a horizontal bearing… …   Universalium