Figure 1
VKS Collaboration

Figure 1: Schematic diagram of the apparatus used by Gallet et al. to simulate magnetic fields created by an astrophysical dynamo. Two impellers counterrotate at frequencies F1 and F2. When F1=F2 the setup is invariant under rotation by 180 degrees about the z axis. The vertical thick lines indicate the locations of the arrays of three-axis Hall probes, which measure the magnetic field close to each disk.