%\cite{Park:FEL2015-MOP066} \bibitem{Park:FEL2015-MOP066} S.~Park, S.~Bae, K.H.~Jang, Y.U.~Jeong, E.-S.~Kim, H.W.~Kim, \emph{et al.}, % S. Park \emph{et al.}, \textquotedblleft{Electron Bunch Length Measurement using an RF Deflecting Cavity}\textquotedblright, % in \emph{Proc. FEL2015}, MOP066, pp. 188--190, % in \emph{Proc. FEL2015}, Daejeon, Republic of Korea, August 2015, paper MOP066, pp. 188--190, in \emph{Proc. 37th International Free Electron Laser Conference (FEL2015)}, Daejeon, Republic of Korea, August 2015, paper MOP066, pp. 188--190, ISBN: 978-3-95450-134-2, \url{http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/mop066.pdf}, doi:10.18429/JACoW-FEL2015-MOP066, 2015.