Another threshold has been reached in fusion
However, this design can also lead to instabilities in the plasma: as its density increases, the plasma becomes more turbulent, causing the plasma to give all its energy to the wall and cool down. research team Madison Symmetric Torus throw away MST He used a type of tokamak device called. According to the University of Wisconsin, unlike other tokamaks, it contains MST plasmas. metal ring is thick and highly conductivewhich allows for more stable operation.
They don’t know for sure how they do it
However, the research team is also cautious about its results. Scientists point out that the results they obtained were obtained in a low-magnetic field, low-temperature plasma. Again, they are the first to do this and they want to continue the research and scale it up.
What is the Greenwald limit?
In the fusion reaction, when the plasma pressure exceeds a certain threshold in the magnetic field pressure, the preservation of the plasma in the tokamak and the progression of the reaction are disrupted or cause instability. Additionally, exceeding this limit may cause great damage to the tokamak itself.
As we reported in our previous news, the aim of nuclear fusion reactors such as tokamaks and stellarators is to reach and maintain conditions in which fusion reactions can occur and large amounts of energy can be produced. One of the key challenges here is to control and maintain the extremely hot plasma required for fusion.
Source
https://interestingengineering.com/energy/tokamak-plasma-stable-10x-greenwald
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.133.055101
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Source link: https://www.donanimhaber.com/fuzyon-enerjisinde-greenwald-limitinin-10-katina-ulasildi–180162