Single-cavity gyromultipliers

Several new configurations of self-exciting gyro-multipliers are proposed. These schemes allow concurrent excitation of radiation at fundamental and harmonic frequencies in a single resonator. It is shown that such an approach simplifies the experimental setup and promises high device efficiency. Experimental proposals based on some of the schemes are presented

Regime of nonresonant trapping in a CARM oscillator

A method for realization of the regime of nonresonant electron trapping in an oscillator scheme of the cyclotron autoresonance maser (CARM) is proposed and theoretically studied. A possibility to achieve simultaneously a high electron efficiency and very weak sensitivity to the electron-beam quality is demonstrated for a moderately-relativistic millimeter-wavelength CARM

Generation of ultra-short quasi-unipolar electromagnetic pulses from quasi-planar electron bunches

A method for the generation of quasi-unipolar pulses based on coherent synchrotron radiation from a quasi-planar electron bunch moving along a curved trajectory is proposed and theoretically studied. It is demonstrated that the experimental realization of this method at an existing installation (Terahertz to Optical Pulse Source) can result in generation of picosecond pulses with a peak power of up to 200 MW

Dynamics of excitation of backward waves in long inhomogeneous systems

The spatio-temporal dynamics of excitation of a long backward-wave oscillator with a profiled resonant parameter is studied in detail. It is shown that the transition to multifrequency regimes of the rf generation occurs due to splitting the long oscillator into several shorter single-frequency oscillators with different eigenfrequencies. This fact can be useful, in particular, for an explanation of the dynamics of the intense cyclotron radiation, which is detected escaping from Earth in the kilometric wavelength range