The file contains temporal evolution of the spatial profiles of the number density of electrons simulated up to 14 ns applying the FEDM code for the streamer benchmark case. The data are stored as a three-column form table where the first column is r [m], the second one z [m] and each subsequent number density of electrons in [m^-3] at different times during the streamer propagation (2, 6, 10 and 14 ns).

Dataset 'Figure 6a'
column 1: r [m]
column 2: z [m]
column 3: n_e [m^-3] @ t = 2 ns
column 4: n_e [m^-3] @ t = 6 ns
column 5: n_e [m^-3] @ t = 10 ns
column 6: n_e [m^-3] @ t = 14 ns