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%\cite{Li:SAP2017-TUPH20}
\bibitem{Li:SAP2017-TUPH20}
Y.D. Li,
\textquotedblleft{Design of 11MeV Low-energy Proton Radiography with Energy Collimation}\textquotedblright,
presented at SAP2017, Jishou, China, Aug. 2017, paper TUPH20, unpublished.
% presented at the 13th Symposium on Accelerator Physics (SAP'17), Jishou, China, Aug. 2017, paper TUPH20, unpublished.