Superconducting Cavities for Synchrotron Use

For two months, as of this writing, a 60 cm length of niobium S-band standing wave accelerator has been installed in the Cornell Electron Synchrotron. The Q0 has remained at its initial value of 1.1 × 109, and the accelerating field at breakdown has remained at 4 MeV/m. The cavity has been used to accelerate the synchrotron beam to 4 GeV by itself and to accelerate the beam to 12 GeV in concert with the normal RF system.