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%\cite{Bussmann:COOL2017-TUM12} \bibitem{Bussmann:COOL2017-TUM12} M.H. Bussmann, T. Beck, G. Birkl, O. Boine-Frankenheim, A. Buss, C. Dimopoulou, \emph{et al.}, % M.H. Bussmann, T. Beck, G. Birkl, O. Boine-Frankenheim, A. Buss, C. Dimopoulou, L. Eidam, T. Giacomini, V. Hannen, D. Kiefer, S. Klammes, C. Kozhuharov, Yu.A. Litvinov, M. Lochmann, M. Löser, X. Ma, F. Nolden, W. Nörtershäuser, R.M. Sanchez Alarcon, M.S. Sanjari, U. Schramm, M. Siebold, P.J. Spiller, M. Steck, T. Stöhlker, S. Tichelmann, J. Ullmann, T. Walther, H.B. Wang, W.Q. Wen, D.F.A. Winters, D. Winzen, and J. Yang, % M.H. Bussmann \emph{et al.}, \textquotedblleft{Scaling Laser Cooling of Ion Beams towards High Beam Energies}\textquotedblright, presented at COOL2017, Bonn, Germany, Sep. 2017, paper TUM12, unpublished. % presented at the 11th Workshop on Beam Cooling and Related Topics (COOL'17), Bonn, Germany, Sep. 2017, paper TUM12, unpublished.