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The present paper concerns the results of calculation of three-stage gyroklystron ??? frequency doubler. It is shown, that at 95-GHz output frequency of the gyroklystron, 126.5-kV beam voltage, 29.5 A current, and a correct choice of the resonator Q, their detuning from the operating frequency and lengths of resonators and drift tubes, it is possible to achieve 45% efficiency of the device at a gain...
The gyro-TWT at slowed-down E0i mode at corrugated waveguide characteristics is investigated. Possibility of achievement of efficiency of 30% is shown at the coefficient of amplification 15 dB.
The results of the optimization search using an elaborated mathematical model for the promising versions of a klynoorbictron-amplifier design to be operated over the frequency range of 180 GHz are presented. The versions of the devices have been found, which are capable of providing from 10 to 14 % efficiency, the gain of 18???38 dB, the output power of 10 to 40 W with input signal power of 0.01???0...
Simulation of mm-and submm-wave amplifiers is performed. A mathematical model is formulated with regard to both the space charge of sheet beams and field sagging in gaps. The power gain of orbictro-klystron (orboklystron) amplifiers is shown to be as high as 20–30 dB at frequencies of 100 to 200 GHz.
The construction and the calculations in designing the 0.18-THz amplifier with regard to the binary comb dimensions are presented. The orbictron-amplifier operating at 3.5 kV and a current of 0.07–0.18 A provides for a 5–9% efficiency, gain of 18 to 38 dB, output power of 10 to 40 W with a signal power of 0.01–0.5 W.
At self-consistent model is constructed, in which the space-charge of sheet-beam and fields sag in gaps are taken into account. It is shown that the calculated electronic power of orboklystron oscillators whose frequencies range between 0.3 and 1.0 THz can run into 24 to 2 W respectively. The amplifiers incorporated in the whole system offers the rated gain of 20 to 30 dB.
A precision method for measuring of ultrahigh unloaded Q factors of superconducting cavities is proposed which is based on the excitation of oscillation in the cavity by electron beam. In this measuring, the cavity is not connected to any external microwave circuit; its unloaded Q factor is determined from the loss of electron-beam power, which can be measured with high accuracy.
With the use of a rigorous theory of calculation of irregular waveguides performed the simulation and optimization of three-mode rejector. The simulation results can be used to develop a superpower Cherenkov oscillators to increase their maximum output power and increase the threshold for electrical breakdown.
Optimal regimes are identified and the limit parameters of frequency giroton-multiplier in which the same signal level is two to fourfold frequency of multiplication with electronic efficiency more than 79% are found. The optimal parameters and analysis of output characteristics of two cascade giroton are described.
Based on modeling and optimization of parameters it is shown, that girotron with a slowing E0i-mode of corrugated waveguide is not the worse output characteristics (efficiency, power, gain) than the usual girotron on H0i-mode quasi-regular waveguide, but requires approximately twice smaller induction of magnet-static field in the area of interaction. The last is very significantly in terms of weight...
Simulation of the millimeter and submillimeter wavelengths generator — klinoorotron with inclinated radial electronic beam is carried out. In this device the plane radial electron beam shaped in a ring electronic gun, is deposited under a small corner at the slowing waves system executed as a radial comb on a mirror of the open resonator. By it will be achieved klinoorotron effect due to which all...
The construction of two-stage millimeter-wave orbictron-amplifier, a mathematical model and computational procedures are briefly described. The calculations of two 180Ghz amplifier embodiments including the resonance dimensions of a binary comb are presented. It is shown that the orbictron-amplifier delivers a 10% efficiency with the following parameters the electro-dynamic system loaded Q-factor...
Based on modeling and optimization of parameters it is shown, that gyrotron with a slowing E0i-mode of corrugated waveguide is not the worse output characteristics (efficiency, power, gain) than the usual gyrotron on H0i-mode quasi-regular waveguide, but requires approximately twice smaller induction of the magnetostatic field in the area of interaction.
Optimal modes are identified and the limit parameters of frequency gyroton-multiplier, in which the same signal level is 2–4-fold multiplication of frequency with electronic efficiency more than 79%, are found. The optimal parameters and analysis of output characteristics of two-cascade gyrotons are described.
A precise method for measuring of ultra-high basic Q-factors of the superconducting cavities is proposed. It is, based upon the electronic beam-excited oscillations. In this measurement the cavity is not coupled to any external microwave circuits. Its basic Q-factor is governed by the electron flow power loss, which can be determined to high accuracy.
Simulation of the millimeter and submillimeter wavelengths generator — klinoorotron with inclinated radial electronic beam is carried out. In this device the plane radial electron beam shaped in a ring electronic gun, is put under a small corner at the slowing waves system designed as a radial comb on a mirror of the open resonator. The carried out calculations validate high efficiency of the suggested...
The possibility of a gyrotron operating on H01 wave with reflective waveguide filters. Electron efficiency of the device can reach 30% and full efficiency of 80%.
Modelling of oscillators and amplifiers of a millimeter and submillimeter range is spent. The mathematical model in which the space-charge of sheet beam and sagging of fields in gaps are considered. It is shown, that the calculation electron efficiency of orbotron-klystrons of oscillators at frequencies 100–200 GHz can reach 1–6 %.
The helix TWT in which the dielectric supports with varying along area of interaction ε are used is suggested. The law of varying ε have maintained the necessary for high efficiency distribution of slowing of helix with constant pitch.
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