Figure 1:  Two poloidal planes that are 90 degrees apart.  The data is modeled by Jong-Kyu Park.  Graphics rendered by Eliot Feibush using the Visit visualization software.

Figure 2:  Four poloidal planes.  The start of each vector is on a grid point in the plane.  The model computes the end point of the vector which might not be in the plane so 3-D visualization is effective.

Figure 3:  The torus can be perceived despite the data density. 

Figure 4:  Looking from outside the torus, some of the planes have been removed.  The effects of the magnetic coils are visible.