The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Zhou:IPAC2017-TUPAB137} \bibitem{Zhou:IPAC2017-TUPAB137} F. Zhou, Y. Ding, J.P. Duris, S. Gilevich, P. Hering, and S. Vetter, \textquotedblleft{Evaluation of FEL Performance with a Longer Injector Drive Laser Pulse at the LCLS}\textquotedblright, % in \emph{Proc. IPAC2017}, pp. 1651--1654, % in \emph{Proc. IPAC2017}, Copenhagen, Denmark, May 2017, paper TUPAB137, pp. 1651--1654, in \emph{Proc. 8th Int. Particle Accelerator Conf. (IPAC'17)}, Copenhagen, Denmark, May 2017, paper TUPAB137, pp. 1651--1654, % ISBN: 978-3-95450-182-3, \url{http://jacow.org/ipac2017/papers/tupab137.pdf}, \url{https://doi.org/10.18429/JACoW-IPAC2017-TUPAB137}, 2017.