The first wakefield test on the C-band choke-mode accelerating structure

A full-scale prototype C-band structure for the e/sup +/e/sup -/ linear collider has been built in which the dipole powers are damped to suppress the long-range transverse wakefield. To verify that the damping works as expected, the C-band structure was tested in the Accelerator Structure SETup (ASSET) at SLAC. This paper presents results of wakefield measurement with ASSET.