Structure studies for an S-band linear collider

The accelerating structure for a future linear collider has to reach a number of goals which are mainly determined by the beam dynamics. Questions of detuning and damping are addressed in order to reduce beam breakup thresholds in this very long linear accelerator operating with bunch trains much longer than the filling time of the structure. The reduction of the linear costs for production and assembly also plays a central role for the development of these travelling wave sections. Geometric simplicity and easy handling have to be a dominant feature to reduce machining costs. The main rf-parameters are reviewed and calculations and measurements concerning tolerances, tuning and damping are presented. (Author) 2 tabs., 4 figs., 4 refs