引入电子群聚函数这一概念，它有利于分析放大器中电子群聚过程。
The electron bunching function suggested here is specially suitable for analyzing the electron bunching process in this amplifier.
文中求得了相应的电子群聚、注一波互作用功率及增益的表达式，并进行了讨论。
We also derive out some useful expressions, such as electron bunching, beam-wave interaction power and gain, and carry out some discussions.
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