The design, construction and performance of the 53 MHz RF cavities for the NSLS X-ray ring

Four single cell RF cavities currently provide the required energy to the X-ray ring beam. Mechanical deficiencies and limitations of these early cavities necessitated their replacement with newly designed units. The selection of forged OFHC copper, replacement of traditional Conflat flanges with integrally machined Marmon type flanges, use of commercial spring loaded metal seals for both vacuum and RF purposes and an enhanced thermal cooling system are among the new design features. Ancillary components such as the input couplers and HOM antennae have also been redesigned utilizing a thermally conductive ceramic material. The design characteristics and performance are reviewed.