noun \ˈtō-kə-ˌmak, ˈtä-\

Definition of TOKAMAK

:  a toroidal device for producing controlled nuclear fusion that involves the confining and heating of a gaseous plasma by means of an electric current and magnetic field

Variants of TOKAMAK

to·ka·mak also to·ko·mak \ˈtō-kə-ˌmak, ˈtä-\

Origin of TOKAMAK

Russian, from toroidal'naya kamera s aksial'nym magnitnym polem (toroidal chamber with an axial magnetic field)
First Known Use: 1965


noun    (Concise Encyclopedia)

Device used in nuclear-fusion research for magnetic confinement of plasma. It consists of a complex system of magnetic fields that confine the plasma of reactive charged particles in a hollow, doughnut-shaped container. The tokamak (an acronym from the Russian words for toroidal magnetic confinement) was developed in the mid-1960s by Soviet plasma physicists. It produces the highest plasma temperatures, densities, and confinement durations of any confinement device.


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