Cavity Magnetron

The cavity magnetron is a high-powered vacuum tube that generates microwaves using the interaction of a stream of electrons with a magnetic field. The 'resonant' cavity magnetron variant of the earlier magnetron tube was invented by John Randall and Harry Boot in 1940 at the University of Birmingham, England. The high power of pulses from the cavity magnetron made centimeter-band radar practical, with shorter wavelength radars allowing detection of smaller objects. The compact cavity magnetron tube drastically reduced the size of radar sets so that they could be installed in anti-submarine aircraft and escort ships. At present, cavity magnetrons are commonly used in microwave ovens and in various radar applications.

Read more about Cavity MagnetronConstruction and Operation, History, Health Hazards

Other articles related to "magnetron, cavity magnetron, magnetrons":

H2S Radar - History - Second World War
... to build H2S around the klystron rather than the magnetron, not wanting to risk the secret of the magnetron falling into German hands ... The klystron wasn't as powerful as the magnetron, but it could be much more easily destroyed in an emergency ... A magnetron's copper anode block, containing resonant cavities from which the operation of the device could be deduced, could survive large demolition charges ...
Cavity Magnetron - Health Hazards
... There is also a considerable electrical hazard around magnetrons, as they require a high voltage power supply ... Some magnetrons have beryllium oxide (beryllia) ceramic insulators, which are dangerous if crushed and inhaled, or otherwise ingested ... by the IARC therefore, broken ceramic insulators or magnetrons should not be directly handled ...