magnetronbuis
A magnetronbuis, or magnetron tube, is a type of vacuum tube that generates microwaves by the interaction of a beam of electrons with resonant cavities in a strong magnetic field. In Dutch usage the term magnetronbuis is common; in English, the device is typically called a magnetron, specifically a cavity magnetron for the high-frequency variant.
The most common design is the cavity magnetron, consisting of a heated cathode inside a cylindrical anode
Operation relies on electron emission from the cathode forming a current that, under the influence of the
History and use: The cavity magnetron was developed in the early 1940s by John Randall and Harry