Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A doughnut-shaped chamber used in fusion research in which a plasma is heated and confined by magnetic fields.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A toroidal chamber in which a plasma is magnetically confined; used in nuclear fusion research.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a doughnut-shaped chamber used in fusion research; a plasma is heated and confined in a magnetic bottle

Etymologies

Russian, from to(roidal'naya) kam(era s) ak(sial'nym magnitnym polem), toroidal chamber with axial magnetic field.
(American Heritage® Dictionary of the English Language, Fourth Edition)
A transliteration of Russian токамак, an acronym of тороидальная камера в магнитных катушках (toroidal chamber with magnetic coils). (Wiktionary)

Examples

  • The word tokamak means "toroidal chamber" in Russian.

    Nuclear fusion power

  • The CFNS is based on a tokamak, which is a machine with a "magnetic bottle" that is highly successful in confining high temperature more than 100 million°C fusion plasmas for sufficiently long times.

    Nuclear Fusion-Fission Hybrid Saves The Future

  • A tokamak is a doughnut-shaped vessel in which researchers use powerful magnet fields to squeeze and heat a plasma of hydrogen isotopes until the nuclei fuse together forming helium and releasing large amounts of heat.

    News

  • Nuclear fusion entails forcing together the nuclei of light atomic elements in a super-heated plasma, held in a doughnut-shaped chamber called a tokamak, so that they make heavier elements and in so doing release energy.

    PhysOrg.com - latest science and technology news stories

  • A tokamak, which is what ITER will be, is basically a D-shaped car tire.

    reddit.com: what's new online!

  • The CFNS is based on a tokamak, which is a machine with a "magnetic bottle" that is highly successful in confining high temperature (more than 100 million degrees Celsius) fusion plasmas for sufficiently long times.

    PhysOrg.com - latest science and technology news stories

  • Further upgrades will lead to studies on the physics and control of high-performance plasmas to improve the future operation of ITER - an international project to design and build an experimental fusion reactor based on the 'tokamak' concept.

    The Engineer - News

  • The magnetic-confinement fusion programme's objectives are to obtain and study conditions approaching those needed in a power plant using the 'tokamak' machine concept - effectively a magnetic bottle that contains the hot plasma.

    The Engineer - News

  • Laser efficiencies are far too low, and pulsed-power systems can't maintain the repetition rates for continuous power generation. 2018 for tokamak fusion is also on the optimistic side.

    Dennis Wingo - Why Space? Why Now? - NASA Watch

  • For the past three decades, PPPL has been a leader in magnetic confinement experiments utilizing the tokamak approach.

    Contributor: Princeton Plasma Physics Laboratory

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Comments

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  • "ITER is based on the 'tokamak' concept of magnetic confinement, in which the plasma is contained in a doughnut-shaped vacuum vessel. The fuel—a mixture of Deuterium and Tritium, two isotopes of Hydrogen—is heated to temperatures in excess of 150 million°C, forming a hot plasma. Strong magnetic fields are used to keep the plasma away from the walls; these are produced by superconducting coils surrounding the vessel, and by an electrical current driven through the plasma."

    --from http://www.iter.org/mach

    January 19, 2012

  • Toroidal'naya kamera s magnitnymi katushkami, accorting to Wikipedia.

    This is a truly beautiful device. The torus is a recurring shape in nature. I think our own inventions will ultimately follow, ever more closely, the shapes and forms of nature's, and be better for it.

    August 26, 2008