Flux, cross sections, and inferred and actual expansions of loop 2 (the notation is the same as in Figure 14). Note that the x −  y projection allows one to observe the expansion of loop 2, but not loop 1, while in the x −  z projection the expansion of loop 1 is clear, but loop 2 exhibits little to no width variations. Note also that neither of the inferred widths allows one to access the actual expansions of the loops.