A coaxial $V$ -band coaxial transit-time oscillator (TTO) operating in TM02 mode with a low guiding magnetic field is presented and investigated. The interaction region is designed to operate in TM02 mode to increase power handling capacity. The number of gaps of interaction cavities is increased and the beam tunnel is widened to achieve mode excitation and low guiding magnetic field operation. A four-gap premodulation cavity is applied to enhance the modulation of the electron beam; the electron beam is preliminarily modulated in the premodulation cavity. Compared with the conventional premodulation cavity, the four-gap premodulation cavity significantly improves the starting time and the conversion efficiency of the oscillator. In the numerical simulation, a 498-MW microwave pulse at 60.4 GHz is obtained with a diode voltage of 400 kV and a beam current of 4 kA. The power conversion efficiency is about 31.1%.

中文翻译：

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在 TM₀₂ 模式下工作的同轴 V 波段相对论传输时间振荡器

提出并研究了在 TM02 模式下工作的同轴 $V$ 波段同轴渡越时间振荡器 (TTO)。交互区域设计为在 TM02 模式下运行以提高功率处理能力。增加相互作用腔的间隙数并加宽束隧道以实现模式激发和低导磁场操作。采用四间隙预调制腔，增强对电子束的调制；电子束在预调制腔中被初步调制。与传统的预调制腔相比，四间隙预调制腔显着提高了振荡器的启动时间和转换效率。在数值模拟中，60 的 498 MW 微波脉冲。4 GHz 的二极管电压为 400 kV，束流为 4 kA。电源转换效率约为31.1%。