tokamaks

A tokamak is a device designed to confine and control hot plasma, a state of matter required for nuclear fusion, using powerful magnetic fields. The name "tokamak" is derived from a Russian acronym meaning "toroidal chamber with magnetic coils." In a tokamak, plasma is shaped like a torus (a doughnut) and is heated to extremely high temperatures to enable fusion, the process that powers the sun. Researchers aim to harness fusion as a clean and virtually limitless energy source, though achieving stable and sustained fusion has proven to be a challenging scientific and engineering endeavor.