Possibilities for Optimizing the Cavity of a High-Power Continuous-Wave Gyrotron

Effect of Resonator Parameters on Frequency and Quality Factor of Gyrotron Resonators

“…• Rounding at the transition is as effective as changing the output taper angle for influence on the quality factor, as has been noted by other authors [5][6][7][8]. • The lower Q cavity exhibited higher efficiency in short pulse operation, in agreement with the results of Choi et al [4], but not in long pulse operation.…”

“…The output taper can be included as part of the resonator, but was not included here because the "residual interaction" that sometimes causes a loss of efficiency in this region is predominantly a result of the fact that the external magnetic field starts to decrease rapidly in this region (see [6]). The effect of the field inhomogeneity is independent of the cavity geometry; a study of this effect is beyond the scope of the present paper.…”

“…The reduction in conversion to unwanted modes has been investigated quantitatively in [5]. The use of smoothly varying resonator profiles has been used in Russia for some time (see [6][7][8] and references therein). That work also confirmed the reduction in quality factor and the conversion to unwanted modes with different radial indices.…”

Technological gyrotron with low accelerating voltage

“…Numerical studies were performed on the basis of the theory of gyrotrons with an unfixed structure of the high-frequency field [6]. Transverse drift of the electron-orbit centers and reradiation of the operating mode into the modes with other radial indices were not allowed for since these factors can only slightly affect the efficiency (by the order of 1%) for generation parameters close to optimal.…”

Numerical Modeling of the Processes of Electron-Wave Interaction in the Cavities of High-Power Gyrotrons with a Frequency of 300 GHz

“…It is natural to base the project implementation on the engineering solutions made earlier when designing high-efficiency Russian megawatt gyrotrons operated at frequencies of up to 170 GHz, which employed cavities in the form of weakly irregular circular waveguides and helical electron beams having a cylindrical configuration and produced by a magnetron-injection gun. The approximate analytical relationships obtained using the method presented in [7] allow one to choose the initial parameters of the cavity, which can further be refined using the methods of detailed numerical simulation. Herein, we will confine ourselves to considering only the processes in the gyrotron cavity, while the other subsystems will be considered elsewhere.…”