Superconducting RF for Direct Acceleration in TeV Colliders

The extensive effort by many of the world's best accelerator personnel which has been required for the commissioning of the SLC shows that pushing the SLC design parameters further will be extraordinarily difficult, if not impossible.Use of parameters which are equal to or less restrictive than those of the SLC, together with large-scale application of superconducting cavity gradients which have been achieved on a small scale, makes a 2 TeV e^+e^- collider worthy of consideration.The low peak power required to fill a high Q cavity and a high ratio of higher order mode damping rate to fundamental power dissipation make a linac using superconducting RF accelerating cavities and periodic bunch trains a potentially viable solution