Carry out an analysis of the flute instability patterned after that for rotating Couette flow and that for convection in stars (Fig. 18.5): Imagine exchanging two plasma-filled magnetic flux tubes that reside near the outermost edge of the torus. Argue that the one displaced outward experiences an unbalanced outward force, and the one displaced inward experiences an unbalanced inward force.

Argue further that the innermost edge of the torus is stable against flux-tube interchange, so the flute instability is confined to the torus’s outer face.

Figure 18.5.

Transcribed Image Text:

before B Vs TH ga B A after