Negative trinity – Positive energy stimuli for tomac fusion

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Tomak tools use strong magnetic fields to limit and shape the shape Plasma Containing fuel for integration. The ideal combination of the plasma shape affects the ease or difficulty of finding a source of energy. In conventional tokamak, the plasma node is shaped like a capital letter.

When the plasma node is shaped backwards and the D curve is connected to the side of the “donut hole”, then this shape is called a negative triangle. New research shows that the negative triangle’s relationship to the surface of the toxin in front of the plasma shows how much plasma is reduced. These findings point to significant benefits for nuclear integration.

Tokakak TCV

Tokamaxes, as shown here, are donut-shaped devices that elicit the TCV, a plasma reaction. The shape of the plasma junction affects the quality of the container. Credit: Image courtesy of CRPP-EPFL, Swiss-Yuratom Association

The effect

Integration Energy Science and Technology One of the challenges is how to build future power plants that control plasma more often than the sun. At these extreme temperatures, the interaction of plasma with the walls of the generator must be controlled and reduced. Unwanted connections occur as a result of disturbances in the plasma boundary.

This study shows that the boundary disturbance in positive triangular plasma is significantly reduced compared to positive triangular plasma. As a result, unwanted contact with the walls in front of the plasma is also greatly reduced, in principle, reducing the risk of wall longevity and damage to the wall, which can clog the reactor.


Scientists know that in Tokmak fusion devices, negative plasma shapes show a significant increase in positive triangularity compared to negative triangular plasma. Negative triangular plasma shapes also show a decrease in the main electron temperature and density fluctuations. This in itself poses promising energy reactors for future integration of negative trinity plasma.

New research here shows that the trinity sign and level have a significant effect on plasma edge variability and energy and particle dispersion properties, but scientists know little about these effects. These experiments on the ካማcole polytechnique fédérale de Lausanne (EPFL) in Lucanne, Switzerland, showed a strong reduction in boundary-plasma exchange and plasma interaction with the front wall to obtain sufficiently negative triangular values. .

The researchers looked at the effects on different sizes in both the inner and outer plasma. This strong reduction in plasma-wall interactions in a sufficiently negative triangle reinforces the prospect of negative triangular plasma as a potential solution.

Reference “Suppressing the first wall interaction in negative triangle plasma on TCV” Woonghee Han, Nico Offeddu, T. Golfinopoulos, Christian Theiler, CK Tsui, JA Boedo, ES Marmar and TCV Group, 19 February 2021; Nuclear integration.
DOI: 10.1088 / 1741-4326 / abdb95

This work is supported by the Bureau of Science and Technology, the Fuel Energy Science Program, and the Swiss National Science Foundation. This work is being carried out within the framework of the EUROfusion Consortium and is funded by the Uratom Research and Training Program.

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