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
The word tokamak means "toroidal chamber" in Russian.
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.
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.
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.
A tokamak, which is what ITER will be, is basically a D-shaped car tire.
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.
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 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.
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.
For the past three decades, PPPL has been a leader in magnetic confinement experiments utilizing the tokamak approach.
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