End-to-end simulations of a superconducting deuteron CH-DTL for IFMIF

The IFMIF project (International Fusion Materials Irradiation Facility) requests two cw linacs operated in parallel. Each of them is designed to provide a 5 MW 125 mA deuteron beam at 40 MeV for the production of an intense neutron flux with an energy around 14 MeV. This paper presents an alternative linac design for this project. The acceleration is completely based on H-type cavities. The room temperature (rt) 4-Vane-RFQ and a short IH-DTL (Interdigital-H-DTL) are followed by 4 superconducting (sc) CH-DTL (Crossbar-H) cavities. The operating frequency is 175 MHz, the designed section lengths are 13 m for the RFQ (Radio-Frequency-Quadrupole) (5 MeV), 1 m for a compact MEBT (Middle Energy Beam Transport), 2 m for the IH-cavity (10 MeV) and 9 m for the sc CH-DTL (40 MeV). The structure parameters and end-to-end multiparticle beam dynamics calculations with and without DTL errors of the whole linac will be presented and the results will be discussed.