The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{xu:ipac2020-wevir04} \bibitem{xu:ipac2020-wevir04} G. Xu and S.C. Jiang, \textquotedblleft{On-Axis Beam Accumulation Based on a Triple-Frequency RF System}\textquotedblright, % --- abbreviated form (published paper) - JACoW template Feb 2018 --- in \emph{Proc. IPAC'20}, Caen, France, May 2020, pp. 40--43. \url{doi:10.18429/JACoW-IPAC2020-WEVIR04} % --- additional material -ISSN/ISBN-- % ISBN: 978-3-95450-213-4, ISSN: 2673-5490