The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{xiang:erl2019-thcoybs01} \bibitem{xiang:erl2019-thcoybs01} R. Xiang, A. Arnold, P. Murcek, J. Schaber, and J. Teichert, \textquotedblleft{Metal and Semiconductor Photocathodes in HZDR SRF Gun}\textquotedblright, % --- abbreviated form (published paper) - JACoW template Feb 2018 --- in \emph{Proc. ERL'19}, Berlin, Germany, Sep. 2019, pp. 142--144. \url{doi:10.18429/JACoW-ERL2019-THCOYBS01} % --- additional material -ISSN/ISBN-- % ISBN: 978-3-95450-217-2