A record-wide powerful magnet for thermonuclear synthesis is 267 km long


The racing of thermonuclear projects is becoming more interesting. The team of scientists from MIT made a breakthrough in the construction of an experimental thermalide reactor — for reliable retention of plasma in Tokamak, they managed to create a magnet with a capacity of 20 Tesl. His length is 267 km. In terms of capacity, it is 1.5 times the magnet, which will be used in the international project of thermonuclear ITER synthesis (it is 13 Tesl), which is built under Marseille in France.

Since 2015, the team of scientists from MIT has worked on the project of an experimental termanuclear ARC reactor (acronym from words accessible, reliable and compact). This tokamak is the same as in ITER, but two times less — with a radius of 3.3 meters,

However, in contrast to ITER magnets, the ACR developers used the so-called high-temperature superconductors in the form of flat tapes that provide a much more powerful magnetic field with smaller sizes. For three years, a command from MIT along with the startup Commonwealth Fusion Systems (CFS) tried to turn them into a magnet.

During the tests, the researchers gradually raised the magnet power until it reached a record for the thermalide magnet of the indicator in 20 TL. It is about 307,000 times more powerful than the magnetic field of the Earth. There is apply this technology in a full-size reactor (and the current prototype is twice as fewer), then, according to scientists, it will make it possible to achieve a magnetic field equivalent to the one that can be found 40 times with a larger tokamak on low-temperature superconducting magnets.

So far, no thermonuclear reactor has been able to work out more energy than need to start the thermonuclear reaction. The appearance of a new, powerful magnet can be an important step towards this goal, as it will make it possible to more efficiently hold the heated plasma much longer than the current record in 120 seconds installed on the experimental reactor in the PRC.

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