FABRICATION OF SUPERCONDUCTING CAVITIES FOR SNS

During the last three years ACCEL fabricated almost all 109 superconducting cavities for the Spallation Neutron Source (SNS) in Oak Ridge, Tennessee. Two series of 35 medium beta (beta=0.61) and 74 high beta (beta=0.81) cavities will be delivered until October 2004. Besides cavity manufacturing ACCEL also performed RF tuning and chemical surface preparation. We give an outline on the current manufacturing experience and comment on future developments for industrial cavity production.