Spectra and snapshots over three faces of the domain, for the squares of velocity, u², magnetic field, b², and vorticity, ω², of the run M_0A020. We display three different phases of the evolution of the system, evolving over time from left to right. Color bars have different ranges to allow a better visualization: for u² the range is (0,0.2); for b² the range is (0,1e−13) for the first snapshot and (0,0.015) for the others; for ω² the range is (0,0.2) for the first snapshot and (0, 2.0) for the others, all in code units. The x, y and z components of the spectra correspond to the red, green and blue lines, respectively. Slope lines in the kinetic energy spectra are proportional to k⁻² before the dynamo and get a bit steeper afterwards. Magnetic energy spectra take a typical Kazantsev k^3/2 slope during the kinematic phase of the dynamo (Kazantsev 1968). We note that the scale of the kinetic energy and vorticity spectra (or enstrophy spectra) are kept constant, but the magnetic ones are not, in order to follow the magnetic field growth.