R. A. Tinguely

Inside a tokamak, a donut-shaped device where magnetic fields confine plasma, the hot gas of charged particles can start to tremble. At first, everything is calm, but then the temperature drops sharply, and sawtooth edges appear on the graph.

Water boils in a pot: bubbles churn, heat quickly escapes into the air. In the center of the ARC fusion reactor, plasma behaves similarly — except instead of bubbles, there are turbulent eddies, and instead of air, there's a magnetic field that must hold the heat.