• V.G. Vaccaro
  Naples University Federico II and INFN, Napoli
• S. Barone
  NRT, Aprilia
• L. Calabretta, A. Rovelli
  INFN/LNS, Catania
• C. De Martinis
  Universita' degli Studi di Milano & INFN, Segrate
• L. Gini, D. Giove
  INFN/LASA, Segrate (MI)
• S. Lanzone
  ADAM, Geneva
• M.R. Masullo
  INFN-Napoli, Napoli
• A.C. Rainò
  Bari University, Science Faculty, Bari
• V. Variale
  INFN-Bari, Bari

ACLIP is a 3 GHz proton SCL linac designed as a booster for a 30 MeV commercial cyclotron. The whole accelerator is a 5 module structure coupled together. The final energy is 62 MeV well suitable for the therapy of ocular tumors. In order to treat deep-seated tumors the energy can be raised up to 230 MeV by adding a second linac. The possibility of using magnetrons, as the source of RF power, to reduce the overall cost of the machine, and the tile design (covered by a patent), named Back-to-Back Accelerating Cavity (BBAC), to efficiently accelerate protons starting from a low energy are two of the more relevant features of this project. The first module (from 30 to 35 MeV) has been full power RF tested in December 2008, showing that the design accelerating field could be easily reached. Then this module, along with all elements of the RF power setup, has been transferred to INFN-LNS in Catania at the end of April 2010 to carry out beam acceleration tests using a 30 MeV proton beam from the Superconducting Cyclotron. In this paper we will review the main features of the linac and discuss the results of the acceleration measurements carried out on this prototype.