First operation of a full-size superconducting cavity unit in LEP

The results of the commissioning and first operation in LEP of a full-size superconducting cavity module are reported. It was operated in the laboratory at a total accelerating voltage of 32 MV. RF power generation, distribution and controls are similar to the LEP copper RF system already in operation. Liquid helium is supplied by a 1 kW refrigerator with the cold box in the klystron tunnel 30 m distant from the cryostat. Initial operating experience on the acceleration of LEP beams, higher order mode excitation, the RF and cryogenic system and controls are described. (author) 11 refs.; 2 figs