RF Power Tests of LEP2 Main couplers on a Single Cell Superconducting Cavity

To determine the power capability of the input couplers for the LEP2 superconducting (SC) cavities a new test set-up has been built. The new set-up permits tests at high RF power levels under realistic conditions (cooled-down SC cavity). The couplers have been exposed to high RF power in matched and unmatched CW conditions as well as in pulsed operation. Power levels of more than 500 kW CW have been reached.