Nuclear fusion
Tokamak (Russian: Токама́к, an abbreviation from the Russian words тороидальная камера в магнитных катушках, transliteration "toroidal'naya kamera v magnitnykh katushkakh", toroidal chamber in magnetic coils (Tochamac), invented in the 1950s) In Nuclear fusion, a toroidal apparatus in which plasma is contained by means of two magnetic fields, a strong toroidal field and a weaker poloidal field generated by an intense electric current through the plasma.