Elektronisuihkulähteen
Elektronisuihkulähde, also known as an electron beam source, is a device that generates and accelerates a focused beam of electrons. These devices are crucial in a variety of scientific and industrial applications. The core principle involves thermionic emission or field emission, where electrons are liberated from a material, typically a heated filament or a sharp tip, by applying a strong electric field. Once generated, these electrons are accelerated through a high voltage potential, gaining significant kinetic energy.
The electron beam is then shaped and focused using a series of electrostatic or magnetic lenses. This
In microscopy, such as in a scanning electron microscope (SEM), the focused electron beam scans the surface