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Electron beam emitter
An electron beam emitter is a device that accelerates free electrons to half the speed of light via high voltage in a vacuum chamber. The accelerated electrons leave the vacuum chamber through a thin permeable membrane and hit the surface, which is to be sterilized with high energy. By passing electrical current through a thin filament inside the vacuum chamber electrons are set free.
Acceleration occurs based on the fundamental principle that like charges repel each other. A high voltage metalplate located behind the filament creates a negative electric field. The electrons located on the surface of the hot filament (which are negatively charged) are repelled by the electric field and are accelerated directly away from both the high voltage metal plate and the filament towards the permeable membrane.
The electrons continue to accelerate as they travel the length of the vacuum chamber until they reach the electron 8-micron thick titanium membrane.
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