Abstract: The effective permeability of ferrite can be adjusted by different perpendicular biased magnetic intensity. Such characteristic could be used to manufacture variable characteristic impedance transmission line. The RF power feeder of IH linear accelerator has different input impedance with different accelerating beam current. An adapter based on above ferrite dominated transmission line has been designed and can compensate the beam loading effects and realize the impedance matching between RF high power amplifier and IH cavity automatically. The relevant computer code has been developed.

Key words: ferrite, transmission line, IH linear accelerator, beam loading

摘要： 系统地阐述了铁氧体可变特征阻抗传输线的设计理论，结合德国重离子物理研究所交叉指强流直线加速器的束载对高频功率馈送的输入阻抗的影响，设计了一个可以在强的加速束载下实现高频功率源和加速腔高频输入阻抗良好匹配的铁氧体可变阻抗适配器。

关键词: 铁氧体, 传输线, 交叉指直线加速器, 束载效应