Fundamental mode detuned travelling wave accelerating structure

In this paper a detuning method for the suppression of the long range wakefields in a linear accelerator structure has been investigated theoretically. A novel travelling wave accelerating structure with its accelerating field phase velocity oscillating around the velocity of light along the structure has been proposed in order to suppress the long range longitudinal accelerating mode wakefield. By detuning also the frequencies of the deflecting modes, the longitudinal and transverse long range wakefields can be suppressed at the same time, which is preferable when a train of bunches is to be accelerated