Victor Konstantinovich Korneenkov

On the feedback in the Smith-Purcell experiment

Refers to the well understood mm-wave region with a standard accelerating voltage 3-5 kV. The positive feedback is held not on the zeroth but minus first space harmonic of the grating surface wave, i.e. the modulated electron beam is self-excited in BWT mode at /spl lambda//spl ap/ 11 mm. The high time harmonics of the modulated electron beam are radiated under certain conditions nearly orthogonal to it as fast (volume) waves. Just an experimental verification of the near-millimeter radiation of the fast (volume) waves not from externally modulated but self-excited surface eigenwave mode electron beam is proof that the coherent radiation of light on fast (volume) waves is due to the nonrecognized Smith-Purcell beam automodulation by infrared surface eigenwaves of the planar reflecting grating.

Packaged DRG of continuous oscillations of increased power of frequency range 30–100 GHz

The output characteristics of breadboard models of diffraction radiation generators with a chain of coupled resonators DRG (CCR) of the frequency range 30-100 GHz with output power more than 20W and accelerating voltage up to 3.6 kV in the continuous mode with satisfactory quality of a signal spectrum are presented.

Design and study of the high-efficiency diffraction radiation oscillator

The main achievements in the development of the diffraction radiation oscillator (DRO) are brought together; the IRE NASU have created various DRO versions which at the accelerating voltage of 2.5 - 4.0 kV continuously span the whole mm wave region. With the feed under 500 W, the output power level varies from less than 1 W in the short-wave part of the mm wave region to tens of watts in the long-wave part. We seek to report the progress made during the last three years in further understanding DRO physics, in the extension of combined (mechanical and electronic) frequency tuning and in the enhancement of the DRO interaction efficiency.

Enhancement of interaction efficiency in diffraction radiation oscillator

The output characteristics of the diffraction radiation oscillator with small-volume open resonator are examined.