SUPERCONDUCTING RF CAVITIES FOR LEP Status Report

Abstract Table I- A few LEP cavity parameters For the upgrading of LEP to energies beyond 55 CeV. S.C. cavities will be used and it is planned to install 4 S.C. cavities in LEP after a first running in period. Results obtained with 350 MHz prototype 4-cell cavities are presented. Besides the S.C. cavities a great effort has gone into auxiliary items like cryostats, main couplers, higher-order mode couplers and frequency tuners. Their layout and test results obtained in S.C. cavity measurements will be shortly presented. Some implications of the use of S.C. cavities in LEP will be discussed. Cu cavities s.c. cavities Frequency 352.209 MHz 352.209 MHz Number of cells 5 4 Cavity active length 2. I3 m 1.70