Figure 7

Time evolution of the central electron density for bunch spacings of 10 and 5 ns, with associated bunch population \(N_{b}=1.7\times 10^{11}\text{ m}^{-3}\) and \(8.5\times 10^{10}\text{ m}^{-3}\), respectively, at a high electron generation rate of \(n_{\gamma}^{\prime}=10^{-3}\text{ m}^{-1}\) (BS:bunch spacing, \(N_{b}\): bunch population). left figure: SEY = 1.1, right figure: SEY = 1.4