Extended Data Fig. 2: Exemplification of the electron spectra for different values of D.
From: Megaelectronvolt electron acceleration driven by terahertz surface waves

a–f Measured electron energy spectra. g–l Integrated beam energy spectra corresponding to a–f. For comparison, four shots for each surface wave traveling distance D are exemplified. These shots are shown in g–l with pink lines, where the highlighted red line indicates the mean value of the data. Note that, bifurcations in some of the spectra images arise possibly from the clockwise and anticlockwise electron trajectories as they revolve around the wire.