用线性流体理论分析了径向渡越时间振荡器谐振腔中电子束与高频场的相互作用,通过数值求解得到了其中束-场能量交换等随直流渡越角的变化规律.与单电子模型的分析结果相比较,流体模型所得结果更具有普适性.

By employing hydrodynamic theory, the interaction between the electron beam and the highfrequency field in the radial gap of the radial transittime oscillator is studied. By using numerical method, curves are given to illustrate the relation between the beamfield power exchange and the gap's transit angle. It shows that the cruuent density and the energy exchange will be oscillating with the transit angle increasing. The number density of beam is bigger, the energy exchange between the beam and the field is stronger. The results obtained from hydrodynamic theory are of more generality compared with those from single electron theory.