The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Park:SRF2017-WEYA06} \bibitem{Park:SRF2017-WEYA06} H. Park, S.U. De Silva, J.R. Delayen, A. Hutton, F. Marhauser, and L. Sweat, \textquotedblleft{Superconducting Twin-axis Cavity for ERL Applications}\textquotedblright, presented at SRF2017, Lanzhou, China, July 2017, paper WEYA06, unpublished. % presented at the 18th Int. Conf. on RF Superconductivity (SRF'17), Lanzhou, China, July 2017, paper WEYA06, unpublished.