%\cite{Shim:FEL2015-MOP082} \bibitem{Shim:FEL2015-MOP082} C.H.~Shim, I.S.~Ko, and Y.W.~Parc, \textquotedblleft{New Soft X-Ray Undulator Line Using 10 GeV Electron Beam in PAL-XFEL}\textquotedblright, % in \emph{Proc. FEL2015}, MOP082, pp. 237--240, % in \emph{Proc. FEL2015}, Daejeon, Republic of Korea, August 2015, paper MOP082, pp. 237--240, in \emph{Proc. 37th International Free Electron Laser Conference (FEL2015)}, Daejeon, Republic of Korea, August 2015, paper MOP082, pp. 237--240, ISBN: 978-3-95450-134-2, \url{http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/mop082.pdf}, doi:10.18429/JACoW-FEL2015-MOP082, 2015.