A magnetic field enclosure (MagShield box) was constructed of μ-metal (which blocks magnetic fields) with a vertical μ-metal partition for running parallel experiments (control and experimental). Two custom-built triaxial Helmholtz coils were positioned in the exact center of each partition (via a stack of plastic well plates) to ensure that experiments were uniformly exposed to each specific magnetic field. Each coil was composed of a Plexiglas skeleton around which a ceramic-insulated copper wire was wrapped multiple times running in two parallel strands on each of the x, y, and z axes. Direct electric current to each coil was supplied by DC power sources (Mastech HY3005D-3) and was fed through the x and y coils in order to create a uniform static WMF. Before each experiment, Helmholtz coils were characterized using a Gauss meter (AlphaLab models GM1-ST or GM1-HS), which was also used to verify the magnetic field at the end of each experiment.

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