to·ka·mak (tô k -m k , t k-)n. A doughnut-shaped chamber used in fusion research in which a plasma is heated and confined by magnetic fields. [Russian, from to(roidal'naya) kam(era s) ak(sial'nym magnitnym polem), toroidal chamber with axial magnetic field.] |   |
tokamak [ˈtɒkəˌmæk]
n
(Physics / General Physics) Physics a toroidal reactor used in thermonuclear experiments, in which a strong helical magnetic field keeps the plasma from contacting the external walls. The magnetic field is produced partly by current-carrying coils and partly by a large inductively driven current through the plasma.
[from Russian to(roidál'naya) kám(era s) ak(siál'nym magnitnym pólem), toroidal chamber with magnetic field]
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| Noun | 1. | tokamak - a doughnut-shaped chamber used in fusion research; a plasma is heated and confined in a magnetic bottle chamber - a natural or artificial enclosed space magnetic bottle - container consisting of any configuration of magnetic fields used to contain a plasma during controlled thermonuclear reactions |
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