%\cite{Kocharyan:FEL2015-MOP085} \bibitem{Kocharyan:FEL2015-MOP085} V.~Kocharyan, G.~Geloni, and E.~Saldin, \textquotedblleft{Scheme to Increase the Output Average Spectral Flux of the European XFEL at 14.4 keV}\textquotedblright, % in \emph{Proc. FEL2015}, MOP085, pp. 251--256, % in \emph{Proc. FEL2015}, Daejeon, Republic of Korea, August 2015, paper MOP085, pp. 251--256, in \emph{Proc. 37th International Free Electron Laser Conference (FEL2015)}, Daejeon, Republic of Korea, August 2015, paper MOP085, pp. 251--256, ISBN: 978-3-95450-134-2, \url{http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/mop085.pdf}, doi:10.18429/JACoW-FEL2015-MOP085, 2015.