Tokamak in a sentence

It’s a fantastic endorsement of the strength of our team, technology and path to commercial fusion energy, combining the spherical tokamak with high temperature superconducting magnets,” Warrick Matthews, Managing Director for Tokamak energy said.

Two other designs have also become fairly well studied; the compact tokamak is wired with the magnets on the inside of the vacuum chamber, while the spherical tokamak reduces its cross section as much as possible.

Among the 20 or so fusion startups, only three are building off the tokamak design.

A number of improvements to the design are now part of the "advanced tokamak" concept, which includes non-circular plasma, internal diverters and limiters, often superconducting magnets, and operate in the so-called "H-mode" island of increased stability.

B247 Braams and Scott, pg. 225 The ST concept appeared to represent an enormous advance in tokamak design.

In 1985, the Japanese tokamak, JT-60 was completed.

In 1988, the T-15 a Soviet tokamak was completed.

In a tokamak system this compression is achieved simply by moving the plasma into a region of higher magnetic field (i.

In contrast, pinch devices and the tokamak rely solely on magnetic fields for confinement, but add additional confining forces to the mix by running an electric current through the plasma itself.

In current tokamak (and other) magnetic fusion experiments, insufficient fusion energy is produced to maintain the plasma temperature.

In response to this surprising development, the AEC decided to concentrate funding on large tokamak projects, and reduce backing for alternative concepts.

Intermediate-wavelength modes (n ~ 5 10 modes encountered in tokamak edge plasmas, for example) are less well understood due to the computationally intensive nature of the stability calculations.

In the advanced tokamak and ST, wall stabilization is critical for operation with a large bootstrap fraction.

Microwave frequencies typically ranging from 110 – 140 GHz are used in stellarators and tokamak experimental fusion reactors to help heat the fuel into a plasma state.

More recently, in the 1990s, problems with the tokamak concept have led to renewed interest in the stellarator design, citation and a number of new devices have been built.

Neutral-beam injection Neutral-beam injection involves the introduction of high energy (rapidly moving) atoms (molecules) into an ohmically heated, magnetically confined plasma within the tokamak.

Newer designs, the advanced tokamak in particular, also use lithium inside the reactor core as a key element of the design.

Strong plasma rotation can stabilize resistive wall modes, as demonstrated in tokamak experiments, and rotational shear is also predicted to stabilize resistive modes.

The Electric Tokamak experiment is intended to have a very large driven rotation, approaching Alfvénic regimes where ideal stability may also be influenced.

The neutron flux is reduced significantly at a purpose-built neutron shield boundary that surrounds the tokamak in all directions.