The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{ito:srf2019-tup078} \bibitem{ito:srf2019-tup078} H. Ito, C.Z. Antoine, H. Hayano, R. Ito, Y. Iwashita, R. Katayama, \emph{et al.}, % H. Ito, C.Z. Antoine, H. Hayano, R. Ito, Y. Iwashita, R. Katayama, T. Kubo, T. Nagata, T. Saeki, and H. Tongu, % H. Ito \emph{et al.}, \textquotedblleft{Lower Critical Field Measurement of NbN Multilayer Thin Film Superconductor at KEK}\textquotedblright, % --- abbreviated form (published paper) - JACoW template Feb 2018 --- in \emph{Proc. SRF'19}, Dresden, Germany, Jun.-Jul. 2019, pp. 632--636. \url{doi:10.18429/JACoW-SRF2019-TUP078} % --- additional material -ISSN/ISBN-- % ISBN: 978-3-95450-211-0, ISSN: ""