An evacuated electron tube used as an oscillator or amplifier at microwave frequencies. In the klystron, an electron beam is velocity modulated (periodically bunched) to produce large amounts of power.

The resulting velocity-modulated electron beam is fed into a cavity resonator to sustain oscillations within the cavity at a desired microwave frequency.

See also: Buncher Cavity, Electron, Klystron Power Amplifier, Reflex Klystron, Stagger Tuning, Synchronous Tuning, Velocity Modulation.

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Subjects: Physics