Medium-Grain Niobium SRF Cavity Production Technology for Science Frontiers and Accelerator Applications

We present the cost-effective production of superconductingradio frequency (SRF) cavities made of medium grain (MG) niobium(Nb) discs directly sliced from forged and annealed billet. Thisproduction method provides clean surface conditions and reliablemechanical characteristics with sub-millimeter average grain sizeresulting in stable SRF cavity production. We propose to apply thismaterial to particle accelerator in the science and industrialapplications. The science applications require high fieldgradients(≥ 30 MV/m) particularly in pulsed mode. Theindustrial applications require high Q$_{0}$ values with moderategradients (∼ 20 MV/m) in CW mode operation. This paperdescribes the MG Nb disc production recently demonstrated anddiscusses future prospects for application in advanced particleaccelerators in the science and industrial applications.