\def\PreionizationElFilam{\begin{frame} \frametitle{Preionization}
    \centering
\GWincludegraphics{width=0.48\textwidth}{Infrastructure/Preionization/Scheme/preionization.jpg} \hspace{0.01\tw}
\GWincludegraphics{width=0.48\textwidth}{Infrastructure/Preionization/ElectronGunUpper/gallery/0413Instalation/IMG_6652.JPG}
\end{frame}}