What is X-ray Protection?

The production of x-rays requires a rapidly moving stream of electrons that are suddenly decelerated or stopped. The source of electrons is the cathode, or negative electrode. Electrons are stopped or decelerated by the anode, or positive electrode. Electrons move between the cathode and the anode because there is a potential difference in charge between the electrodes. The components of the X-ray tube include a glass envelope containing a high vacuum. A cathode or negative electrode which contains a tungsten filament, which when heated emits electrons in a process called 'thermionic emission.
Tungsten alloy is required as it has a high atomic number to improve the efficiency of bremsstrahlung x-ray production, and a high melting point.
 

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