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  • electron beam (e-beam) A stream of electrons emitted by a single source that move in the same direction and at the same speed.
  • electron-beam gun 1. A device generally used in a cathode-ray or camera tube to emit a stream of electrons moving at uniform velocity in a straight line. It consists of an emitting cathode and an anode, with an aperture for passage of some of the electrons. 2. A...
  • electron-beam evaporation A method of thin-film deposition in which electrons boiled off a heated cathode are used to melt the coating material. If a multipocket crucible is used, many materials can be processed at the same time.
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