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RF SYSTEM OF THE CSNS SYNCHROTRON

The accelerator of China Spallation Neutron Source (CSNS) consists of a H− linac and a rapid cycling synchrotron (RCS). The protons injected into the RCS will be accelerated from 81MeV to 1.6GeV by the RCS RF system providing a maximum accelerating voltage of 165kV. The RF frequency sweeps from 1.02 MHz to 2.44 MHz with a repetition rate of 25Hz. The ferrite-loaded RF cavities will be used in the RCS RF system. Each cavity has own RF power tube amplifier, bias current supply and full digital LLRF control loops. The R&D of RCS RF system have been completed, it compose of the prototypes of a full size ferrite loaded RF cavity, a high power tetrode amplifier, a switching type bias supply of 3000A and a full digital embedded controller of LLRF. CSNS RCS RF system design and the test results of the R&D prototype will be described in this paper.