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 caw?)$ The couplers have been exposed to high RF po wer in matched and unmatched CW conditions as well as in pulsed operation. Power levels of more than 500 kW C W have been reached