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The cavity magnetron is a high-power vacuum tube used in early radar systems and subsequently in microwave ovens and in linear particle accelerators. A cavity magnetron generates microwaves using the interaction of a stream of electrons with a magnetic field, while moving past a series of cavity resonators, which are small, open cavities in a ...
a magnetron control circuit (usually with a microcontroller) a short waveguide (to couple microwave power from the magnetron into the cooking chamber) a turntable and/or metal wave guide stirring fan; a control panel; In most ovens, the magnetron is driven by a linear transformer which can only feasibly be switched completely on or off.
The electrons thus do work on the electric field, and are decelerated, their kinetic energy is converted to electric potential energy, increasing the amplitude of the oscillating electric field in the cavity. Thus the oscillating field in the catcher cavity is an amplified copy of the signal applied to the buncher cavity.
This is unlike conventional microwave vacuum tubes such as klystrons and magnetrons, in which the wavelength is determined by a single-mode resonant cavity, a slow-wave structure. Thus, as operating frequencies increase, the resonant cavity structures must decrease in size, which limits their power-handling capability.
The spiraling of electrons in a cylindrical vacuum chamber within a transverse magnetic field is also employed in the magnetron, a device for producing high frequency radio waves . In the magnetron, electrons are bent into a circular path by a magnetic field, and their motion is used to excite resonant cavities , producing electromagnetic ...
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Practical implementations fail because there is no substantial energy in magnets that could be employed for propulsion or to compensate for energy losses. The force between permanent magnets is conservative as the magnetic field follows a potential, so that there is no work done over a closed cycle. After a short amount of time, such a motor ...
Preparing for a big work presentation. Having a rocky period in a relationship. Dealing with a short-term illness. This type of insomnia often happens due to a specific stressor that crops up in ...