Food for Thought #7: donuts!

Due: Friday, 6 November 2020, 4:00 PM

This week we have seen that the confinement of plasma can be lost via diffusion and/or recombination. Different cross-field drifts were omitted by saying that they can always be aligned with the vessel walls. Reconsider the drift issue by thinking what happens if we try to take the cylindrical vessel and simply eliminate its end losses by turning it into a torus. Consider the gradient and E × B drift and think out what their combined effect would do to the confinement of electrons and ions. Initially assume only the magnetic field that resulted from bending the cylinder into a donut and which is toroidal now.