Compact cryomodule for mobile stand-alone superconducting industrial accelerators

• Superconducting accelerators promise to be an efficient source of industrial radiation. • Industrial SRF linacs become possible thanks to the conduction cooling. • Mobile liquid-free cryomodule is developed to enable industrial SRF accelerators. • RadiaBeam and Fermilab have designed, built and tested the cryomodule for industrial SRF linac. Superconducting RF (SRF) accelerators have the potential to be more profitable in comparison with normally conducting accelerators, as long they can be made compact, achieve operational simplicity, autonomy, transportability, satisfactory energy efficiency, as well as have reasonable costs. The development of SRF technologies such as Nb 3 Sn coating, conductively-cooled resonators, and high-capacity liquid-helium-free cryocoolers made SRF accelerators mobile and energetically and economically efficient at a beam power of tens of kW. One of the key elements of such an accelerator is the cryomodule, which must have minimal thermal losses to enable operation from low power cryoheads and enable conductive cooling of SRF resonator. In this paper we present the design and test results of a compact cryomodule for an industrial stand-alone SRF linear accelerator prototype, based on 650 MHz elliptical resonators, being developed at Fermi National Accelerator Laboratory.