Fig. 2
From: Laboratory evidence of dynamo amplification of magnetic fields in a turbulent plasma
Characterization of the plasma turbulence. a X-ray pinhole image of the colliding flows at t = 35 ns after the laser drive, using the 5 ns pulse profile. The image was recorded onto a framing camera with ~1 ns gate width and filtered with 0.5 μm C2H4 and 0.15 μm Al. The pinhole diameter is 50 μm. b Rendering of the electron density from three-dimensional FLASH simulations at t = 35 ns. c The open blue circles give the power spectrum of the X-ray emission from the collision region, defined by the rectangular region shown in panel a. The power spectrum has been filtered to remove edge effects and image defects. Details of this procedure are given in Supplementary Methods. The shaded region at high wavenumbers is dominated by noise. The spectrum of the density fluctuations, as obtained from FLASH simulations in the turbulent region, is shown with red squares. d Blue diamonds: power spectrum of the kinetic energy from FLASH simulations. Red squares: power spectrum of magnetic energy from FLASH simulations. The simulated magnetic energy spectrum is considerably shallower than the Kolmogorov-like kinetic energy spectrum, as predicted by ref. 23 and other studies in the Pm < 1 regime (see text)
