Definition of electron-beam gun

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DataRay Inc. - ISO 11146-Compliant Laser Beam Profilers

Photonics Dictionary

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 device used in electron-beam evaporation, comprising a heated cathode to generate the electrons, a high-voltage system to accelerate the electrons, a water-cooled crucible containing the material to be evaporated, and electromagnets to deflect the electrons into the crucible.

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