The development of small-orbit gyrotrons operating at voltages/spl les/100 kV is reviewed.
Gyrotron oscillators have been developed to produce unprecedented 200-kW average …

Recent advances in the modeling and simulation of vacuum electronic devices are
reviewed. Design of these devices makes use of a variety of physical models and numerical …

Experiments on a unique, high-power, millimeter wave amplifier (a phase-coherent,
harmonic-multiplying, inverted gyrotwystron) are reported. Superior stability resulted from …

Experimental results of the first efficient operation of a long pulse cyclotron autoresonance
maser oscillator are presented. Output power of 1.9 MW for a beam energy of 450 keV and …

We present results of theoretical study of mode competition during the voltage rise of a 300-
kW, 300-GHz gyrotron operating in the TE 22, 2, 1 mode. Simulations tracking eight …

The nonlinear processes taking place in the harmonic multiplying gyrotron traveling wave
amplifier are analyzed. By amplifying a drive wave through interaction at the fundamental …

We present experimental results of the modes excited during the voltage rise of a 1.5-MW,
110-GHz gyrotron operating in the TE 22, 6, 1 forward-wave mode. Results were obtained …

This thesis reports on the design and experimental verification of two novel high efficiency
quasi-optical mode converters for gyrotron oscillators. Gyrotrons produce high order TEm, p …

Experiment on a new type of high-power, millimeter wave amplifier,(a harmonic-multiplying,
inverted gyrotwystron), are reported. Superior stability resulted from two factors:(1) …

This study was motivated by the desire to increase the power, which can be delivered by
gyrotrons in long pulse and continuous regimes. Since the admissible power level is …