Theoretical and experimental study of linear collider accelerating structures impedance characteristics

The relations between resonance frequency, Q-factor and coupling coefficient between a coupler and a disk loaded waveguide (DLW) and DLW electrodynamic parameters were obtained by an equivalent circuit. When these relationships are derived, an input impedance of the accelerating structure is a real positive value at all passbands. Characteristic calculations for the VLEPP accelerating structure impedance are carried out by different values of tolerances, and at a coupling resonant frequency. (author) 2 refs.; 6 figs