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The IFMIF-DONES facility will irradiate and characterize materials to be used in fusion reactors using a neutron flux produced by the interaction of a deuteron beam with a liquid lithium target. A superconducting RF linac will accelerate the beam to the final energy of 40 MeV through two series of superconducting half-wave resonators operating at 175 MHz. The study of a new design for the second family of 27 cavities (optimized for β = 0.18) has been recently presented by INFN, to optimize it from the point of view of production, while maintaining its performance close to what was observed at the first CEA prototype. This paper describes the electromagnetic and mechanical design of the β = 0.18 HWR, conducted in a Multiphysics approach of the cavity optimization. The contributions of pressure, tuners, Lorentz’s force, thermal expansion, construction techniques are analysed up to meet physical and mechanical requirements.
| Paper status | Resubmitted proceeding files received and assigned to an editor. Accepted by Submitter. |
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