Исходники иллюстрации

\documentclass[tikz]{standalone}\input{pre.tex}\begin{document}\begin{tikzpicture}
        \foreach \x in {0,0.25,...,4} {
              \draw[black!20,latex-] (\x,0) -- ++ (0,4);
        }
        \draw[draw=none] (4,0) -- node[right]{$\vec{E}$} ++ (0,4);
        \draw (0,0) -- node[below] {Катод} ++(4,0);
        \draw (0,4) -- node[above] {Анод} ++(4,0);

        \draw[dashed,->] (-1,0) -- ++(0,4) node[above] {$+x$};

        \draw (-1.1,0)--node [below] {$0$}(-0.9,0); 

        \draw[-latex] (2,2) -- ++ (0,1) node [above, fill=white] {$\vec{F}_L$};
        \draw[fill=magenta] (2,2) circle (4pt);
    
\end{tikzpicture}\end{document}