High Efficiency Gyrotron Oscillator and Amplifier.
Patent, Filed 11 Mar 80, patented 25 Jan 83,
DEPARTMENT OF THE NAVY WASHINGTON DC
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An electron cyclotron maser high-frequency generatoramplifier having a cavity resonator positioned in an axial magnetic field. A spiralling beam of relativistic electrons is injected into the cavity and stimulated emission of radiation by the electrons takes place at the frequency of a wave mode supported by the cavity resonator. The transverse efficiency, defined as the average electron energy loss divided by its initial transverse energy, is maximized by disposing a shaped iron collar about the cavity resonator to provide an axial magnetic field in the cavity resonator whose amplitude increases in the beam direction-of-travel. In an alternative embodiment, the transverse efficiency is maximized by tapering the inner wall of the cavity in the axial direction to provide a wave-mode in the cavity resonator whose electric-field amplitude increases in the beam direction-of-travel.
- Electrical and Electronic Equipment
- Electricity and Magnetism