Development of the QWR Power Coupler for the NICA Injector

A new accelerator complex, Nuclotron based Ion Collider fAcility (NICA), is being created on the basis of the Joint Institute for Nuclear Research (JINR, Dubna, Russia) to study the properties of dense baryonic matter. It is planned to use superconducting sections as part of the accelerator injector NICA. The first of these sections will consist of quarter-wave coaxial resonators, working at a frequency of 162MHz with β = 0.12[1,2].For effective operation of such resonators, it is necessary to develop a reliable RF power input device. This article describes the power input design, based on a coaxial waveguide. Issues of thermal reliability of the device are considered, and electrodynamic characteristics are presented.