The couplers of accelerator structures are important components of electron knear . the efficient delivery of power from rf sources to accelerator structures depends crucially on the coupler cavity . the input coupler cavity is to be well matched , that is to say , it must have proper coupiing . and it must be tuned to the synchronous frequency . in this way , we can obtain the maximum power . in the past , the decision of the coupler cavity dimensions is very difficult 加速結構的輸入耦合腔是電子直線加速器的重要組成部分。功率從功率源輸送到加速管中,就依賴于輸入耦合腔。輸入耦合腔在整個結構中必須有良好的匹配即有恰當?shù)鸟詈隙?,還必須工作在諧振頻率。