The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Hakobyan:IPAC2017-TUPAB021} \bibitem{Hakobyan:IPAC2017-TUPAB021} L. Hakobyan, H. Davtyan, B. Grigoryan, and A. Vardanyan, \textquotedblleft{The Study of Focus-Dependent Dark Current for AREAL RF Photogun}\textquotedblright, % in \emph{Proc. IPAC2017}, pp. 1358--1360, % in \emph{Proc. IPAC2017}, Copenhagen, Denmark, May 2017, paper TUPAB021, pp. 1358--1360, in \emph{Proc. 8th Int. Particle Accelerator Conf. (IPAC'17)}, Copenhagen, Denmark, May 2017, paper TUPAB021, pp. 1358--1360, % ISBN: 978-3-95450-182-3, \url{http://jacow.org/ipac2017/papers/tupab021.pdf}, \url{https://doi.org/10.18429/JACoW-IPAC2017-TUPAB021}, 2017.