W波段带状注扩展互作用速调管注波互作用系统

Interaction system of W-band sheet beam EIK

对W波段带状注五间隙耦合腔的高频结构进行了设计与分析,以一个五间隙耦合腔作为输入腔,一个五间隙耦合腔作为输出腔,构成了W波段SBEIK的注波互作用系统,利用CST粒子工作室对整个注波互作用系统进行了三维计算模拟,并用Magic 3D对注波互作用计算进行了验证,结果表明两种PIC软件的计算结果基本一致.该SBEIK在电子注电压为75 k V、电流为4 A条件下,仅用两个腔体在W波段实现了高于24 d B的增益,为下一步高增益、高效率、小型化、紧凑型SBEIK的设计奠定了坚实的基础.

RF structure of W- band sheet beam EIK has been designed in this paper. The interaction system consists of two five-gap cavities, one is used for input cavity, the other is output cavity. The whole beam wave interaction system has been calculated and simulated by two kinds of 3D-PIC software, and the results agree well. Beam voltage of the SBEIK is 75 kV, and beam current is 4 A. The gain of whole tube is higher than 24 dB, which is only consisted of two resonant cavities. If there are more cavities, the tube will get higher gain. This is a big progress and is very useful for the design of multi -cavities SBEIK.