The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Yokota:IPAC2016-THPOW006} \bibitem{Yokota:IPAC2016-THPOW006} A. Yokota, R. Kaku, M. Kuriki, K. Negishi, Y. Seimiya, and M. Urano, \textquotedblleft{A Study of Operational Lifetime of CsK2Sb Photo-cathode}\textquotedblright, % in \emph{Proc. IPAC2016}, pp. 3938--3940, % in \emph{Proc. IPAC2016}, Busan, Korea, May 2016, paper THPOW006, pp. 3938--3940, in \emph{Proc. 7th Int. Particle Accelerator Conf. (IPAC'16)}, Busan, Korea, May 2016, paper THPOW006, pp. 3938--3940, % ISBN: 978-3-95450-147-2, \url{http://jacow.org/ipac2016/papers/thpow006.pdf}, \url{doi:10.18429/JACoW-IPAC2016-THPOW006}, 2016.