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%\cite{Nakagawa:HIAT2015-THM1C01}
\bibitem{Nakagawa:HIAT2015-THM1C01}
T.~Nakagawa, Y.~Higurashi, and J.~Ohnishi,
\textquotedblleft{Further Improvement of Performance of RIKEN 28GHz SC-ECRIS and Search for the Optimum Structure of ECR Ion Sources}\textquotedblright,
% presented at HIAT2015, Yokohama, Japan, September 2015, paper THM1C01, unpublished.
presented at the 13th Heavy Ion Accelerator Technology Conference (HIAT2015), Yokohama, Japan, September 2015, paper THM1C01, unpublished.