R&D OF NIOBIUM-SPUTTERED COPPER QWR FOR HEAVY ION LINAC IN PEKING UNIVERSITY

With the advance in the research on the RF Superconductivity, a lot of experiments on niobium-sputtered copper quarter wave resonator (QWR) have been done in Peking University. A DC sputtering system with other auxiliary devices is set up completely. Sputtering parameters are under control. Superconducting properties of the cavity and the properties of the niobium film are measured. Experiments in low temperature and with beam load will be carried out by the end of 1998. Niobium-sputtered QWR can be used for heavy ion linac such as Beijing Radioactive Nuclear Beam Facility.