Terahertz waves, which lie in the frequency range of 0.1-10 THz, have long been
investigated in a few limited fields, such as astronomy, because of a lack of devices for their …

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” …

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

A novel thermionic cusp electron gun operating in the temperature-limited regime that
produces a large-orbit electron beam through a nonadiabatic magnetic-field reversal was …

The frequency multiplication of a two-stage tapered gyrotron traveling wave tube amplifier is
experimentally verified in low-voltage and low-current operation. By modulating an axis …

High efficiency and broadband operation of a gyrotron traveling wave amplifier (gyro-TWA)
require a high-quality electron beam with low-velocity spreads. The beam velocity spreads …

High-quality axis-encircling electron beam is essential to drive a high-harmonic gyrotron. A
magnetic cusp gun that can generate a low-spread axis-encircling electron beam at an …

A magnetic cusp gun (MCG) is being developed to generate an axis-encircling electron
beam, which is called the large orbit beam, which is going to drive a 0.396-THz fourth …

A magnetic cusp gun with a control grid was optimized through parametric simulations for a
gyrotron traveling-wave amplifier with an output power of 10 kW and a central operating …

A cusp gun has been designed for a high-power W-band gyrotron traveling-wave tube (gyro-
TWT) with a helically corrugated waveguide operating at the second harmonic of the …