SUPERCONDUCTING RF ACTIVITIES AT LNL

Many superconducting rf activities are being pursued at LNL for present and future projects: the ALPI superconducting linac operation, maintenance and upgrading with Cu-Nb sputtered and bulk Nb cavities; the construction of the PIAVE injector with the new superconducting RFQ's and low-beta quarter wave resonators; the development of new construction techniques by spinning of Tesla-type bulk Nb and Nb- clad-Cu cavities, in collaboration with DESY, JLAB, KEK; sputtering of superconducting MgB2 thin films on samples; linac design studies and intermediate beta cavities prototyping for high intensity proton a ccelerators (TRASCO) and for future radioactive beam facilities (SPES, EURISOL). Superconducting cavity prototyping is done also in collaboration with other laboratories (CERN, TRIUMF, MSU, KFA JUELICH) for present and future superconducting linac projects. The status of these activities, the r ecent results and the future goals will be presented.