M. Vretenar, R. Zennaro (CERN, Geneva, Switzerland), D. Davino, M.R. Masullo, V.G. Vaccaro (University INFN of Naples, Italy), M. Weiss (TERA Foundation, Italy)
In the framework of a collaboration between CERN, the Universities and INFN of Milan and Naples and the TERA Foundation, a 3 GHz Side-coupled structure to accelerate protons between 62 and 74 MeV has been designed, built and tested at CERN. This is intended to be the first of 9 modules of a 200 MeV Linac-Booster (LIBO) to post-accelerate the beam from existing cyclotrons up to an energy range useful for treatment of deep cancerous tumours. Each module is composed of 4 tanks of 25 cells each, connected by bridge-couplers, and fed by a klystron. The procedure followed for the RF design and for the tuning of the small 3 GHz Side-coupled cells and of the 3-cell magnetically-coupled bridge- couplers is described. The results of the low-level RF measurements are given, which are followed by high power tests at CERN.
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