Electron beam machining (EBM) uses a focused stream of electrons. The process is widely used for welding, melting, material removal and annealing. Since the stream may have many technical applications, its power density can various (power density is defined as a relation between the beam power and its cross-section). Cutting requires the biggest densities. Smaller densities are used for welding and boring.
The energy of an electron beam, changes into heat, while in contact with working material. Due to that a local increase in heat appears which highly exceeds the melting point of every possible material, accompanied by rapid vaporization. Electrons must have enormous speed while going from the electron gun. Huge accelerations may be achieved by applying big value of accelerating voltage.
Current of an electron stream emission is a current of an electron beam, emitted by a cathode. The current is very small (only few mA) and depends on a cathode material, its temperature and an accelerating voltage.
The energy of an electron beam, changes into heat, while in contact with working material. Due to that a local increase in heat appears which highly exceeds the melting point of every possible material, accompanied by rapid vaporization. Electrons must have enormous speed while going from the electron gun. Huge accelerations may be achieved by applying big value of accelerating voltage.
Current of an electron stream emission is a current of an electron beam, emitted by a cathode. The current is very small (only few mA) and depends on a cathode material, its temperature and an accelerating voltage.
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| Electron Gun Working Principles |
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