This paper presents a review of the experimental achievements related to the development
of high-power gyrotron oscillators for long-pulse or CW operation and pulsed gyrotrons for …

Gyrotron oscillators (gyromonotrons) are mainly used as high power millimeter wave
sources for electron cyclotron resonance heating (ECRH), electron cyclotron current drive …

The experimental results of a thermionic cusp electron gun, to drive millimeter and
submillimeter wave harmonic gyrodevices, are reported in this paper. Using a “smooth” …

Helically corrugated waveguide has been used in various applications such as gyro-
backward wave oscillators, gyro-traveling wave amplifier and microwave pulse compressor …

Experimental operation of a gyrotron traveling wave amplifier with a helically corrugated
waveguide using a thermionic cathode electron gun is presented. The coupling between the …

A broadband multi-layer microwave window operating in the W-band frequency range was
numerically simulated, constructed and its microwave properties measured. The window …

We present the quasi-analytical spatiotemporal theory, which describes the process of
establishing generation in a backward-wave gyro-oscillator based on the use of a sectioned …

The generation of an annular-shaped axis-encircling electron beam using a smooth
magnetic cusp was studied through numerical simulations and experiments for harmonic …

We describe the small-signal theory of a backward-wave gyro-oscillator with a sectioned
quasi-optical system with the zigzag path of the operating wave beam. This theory explains …

A gyrotron backward wave oscillator (gyro-BWO) with a helically corrugated interaction
waveguide demonstrated its potential as a powerful microwave source with high efficiency …