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A pulse prototype of a W-band TE01 mode gyrotron traveling-wave tube (gyro-TWT) amplifier is designed, and it features high gain and broadband capabilities. Theoretical investigation predicts that, when the magnetic injection gun (MIG) is optimized to generate an electron beam of voltage 70 kV, current 3 A, high pitch factor 1.5, and low axial-velocity spread about 5%, the gyro-TWT amplifier is of...
This paper presents the conceptual design of a W-band high-harmonic gyrotron oscillator with a permanent magnet system. Mode selection, cavity design, beam-wave interaction calculations, electron-optical system, and quasi-optical mode converter output system are described. The gyrotron operates at the third harmonic of the electron cyclotron frequency with the beam interacting with a ...
A W-band reflective gyrotron backward wave oscillator (Gyro-BWO) is fabricated to systematically study the physics of competition between backward wave and forward wave. Two cavities, namely a single cavity and complex cavity, will be tested. Theoretical investigation indicates that the competition in a complex cavity is much improved and is capable of generating much stronger efficient radiation.
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