ELMO Bumpy Torus programme

Abstract

The ELMO Bumpy Torus experiment was designed to test the idea of stabilizing a multiple mirror plasma by the use of energetic electron rings, while eliminating end losses by closing the device into a circular toroid. The experiment did provide a quiescent mode of operation; however, there were major radial losses of particles and energy. These were attributed to effects associated with the uniformly distributed toroidal curvature; an improved device, the ELMO Bumpy Square, was proposed to eliminate this problem.