Tokamak

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Summary

A tokamak is a machine which uses a powerful magnetic field generated by external magnets to confine plasma in the shape of an axially symmetrical torus.

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primary physical mechanism for tokamak operation
Tokamaks are the most prominent implementation of magnetic confinement fusion, using magnetic fields to keep plasma away from reactor walls.
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the power-generating process inside a tokamak
Tokamaks are designed to facilitate nuclear fusion by overcoming the Coulomb barrier through extreme heating and confinement.
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the state of matter confined by tokamaks
The tokamak is specifically designed to contain and heat plasma to the extreme temperatures required for nuclear fusion.
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current international flagship tokamak project
ITER is the world's largest tokamak experiment, designed to demonstrate the feasibility of large-scale fusion power production.
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defines the core design architecture of the KSTAR reactor
KSTAR is a tokamak, which is a specific type of fusion reactor that uses a toroidal magnetic field to confine plasma.
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alternative magnetic confinement configuration
The tokamak is the primary competitor to the stellarator, relying on a large toroidal current to create the necessary magnetic twist, whereas the stellarator does not.
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pioneering large-scale tokamak experiment
JET was the first tokamak to achieve significant fusion power using deuterium-tritium fuel, serving as a critical precursor to ITER.
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co-inventor of the tokamak concept
Along with Igor Tamm, Sakharov proposed the original tokamak design in 1950, which utilized a toroidal magnetic field to confine hot plasma.
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the primary fuel reaction for tokamak reactors
This specific fusion reaction is the most viable for current tokamak designs due to its high cross-section at achievable temperatures.
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performance benchmark for tokamak fusion reactors
The Lawson criterion defines the necessary conditions of temperature, density, and confinement time for a tokamak to achieve net energy gain.
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Fusion reactor type utilizing divertors
Most modern tokamaks use a divertor configuration to control the plasma boundary and exhaust impurities, replacing older limiter-based designs.
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Primary magnetic confinement device architecture
The tokamak is the most prominent reactor design used in fusion research to confine hot plasma using magnetic fields.
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auxiliary heating method for tokamak plasma
To reach fusion temperatures, tokamaks inject high-energy neutral atoms into the plasma, which transfer their kinetic energy through collisions.
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initial method for heating tokamak plasma
Tokamaks use the plasma's own electrical resistance to generate heat, though this method becomes less effective as plasma temperature rises.
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essential component for generating tokamak magnetic fields
Modern tokamaks rely on superconducting magnets to produce the intense, sustained magnetic fields required to confine plasma for long durations.
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major engineering challenge in tokamak design
Maintaining plasma stability is the primary difficulty in tokamaks, as instabilities can lead to loss of confinement and damage to the reactor.
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the electrostatic force that tokamaks must overcome
Tokamaks must heat plasma to millions of degrees to give nuclei enough kinetic energy to overcome the Coulomb barrier and fuse.
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critical fuel cycle requirement for future tokamaks
Because tritium is rare, future commercial tokamak reactors must breed their own fuel using lithium blankets surrounding the plasma torus.
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Facts