中文摘要：

以单间隙微波腔为研究对象，将电子束作为激励源，根据Maxwell方程和电子受到的洛沦兹力，建立微波腔在电子束作用下的激励方程和电子束在微波场作用下的运动方程（即微波谐振腔中电子束同微波场相互作用的自洽方程组），由此进一步研究一维情况下束波互作用的非稳态作用过程，在理论上给出：当工作电流远大于起振电流时，微波腔在非稳态过程中产生很强的窄脉冲辐射。

英文摘要：

The equations about actions between the RF field and electron beam are established based on Maxwell theory and Lorentz force acting on electrons, these equations are also called self-consistent equations for action between micro-wave and electron beam in RF cavity. Based on the self-consistent equations, the single-ga PRF cavity is one-dimensionally studied, the curves of microwave field versus time are given for different beam currents. It is shown that very high microwave can be generated when the beam current is far beyond the start-u Pcurrent.