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提出了一种新的注波互作用慢波系统———在部分填充介质的波导中放置一等离子体柱．利用线性自洽场理论，对这一新慢波系统中的相对论电子注与波的互作用进行了分析．具体针对薄环形相对论电子注包围等离子体柱和在等离子体柱内穿过慢波系统这两种情况，分别导出了决定注波互作用的色散方程．并对色散方程直接进行了数值求解，求得了系统的截止频率、工作频率和波增长率等．讨论了等离子体柱等有关参数对它们的影响．
A new wave-wave interaction system is proposed, in which a plasma column is placed in a waveguide partially filled with a medium. The linear self-consistent field theory is used to analyze the relativistic electron-wave interaction in this new slow-wave system. In particular, the dispersion equations that determine the interaction of the wavelets are deduced for both the case where the thin-ring relativistic electron-beam encloses the plasma column and the case that it passes through the slow-wave system in the plasma column. The dispersion equation is directly solved numerically, and the cut-off frequency, working frequency and wave growth rate of the system are obtained. The effects of plasma column and other related parameters on them are discussed.