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Nuclear fusion reactor in South Korea runs at 100 million levels C for a record-breaking 48 seconds

April 15, 2024
in Astronomy
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Nuclear fusion reactor in South Korea runs at 100 million levels C for a record-breaking 48 seconds
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South Korea’s “synthetic solar” has set a brand new fusion document after superheating a plasma loop to 180 million levels Fahrenheit (100 million levels Celsius) for 48 seconds, scientists have introduced. 

The Korea Superconducting Tokamak Superior Analysis (KSTAR) reactor broke the earlier world document of 31 seconds, which was set by the identical reactor in 2021.The breakthrough is a small however spectacular step on the lengthy street to a supply of near-unlimited clear power. 

Scientists have been attempting to harness the facility of nuclear fusion — the method by which stars burn — for greater than 70 years. By fusing hydrogen atoms to make helium below extraordinarily excessive pressures and temperatures, so-called main-sequence stars convert matter into gentle and warmth, producing monumental quantities of power with out producing greenhouse gases or long-lasting radioactive waste. 

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However replicating the circumstances discovered contained in the hearts of stars is not any easy job. The commonest design for fusion reactors — the tokamak — works by superheating plasma (one of many 4 states of matter, consisting of optimistic ions and negatively charged free electrons) and trapping it inside a donut-shaped reactor chamber with highly effective magnetic fields.

Preserving the turbulent and superheated coils of plasma in place lengthy sufficient for nuclear fusion to occur, nevertheless, has been a painstaking course of. Soviet scientist Natan Yavlinsky designed the primary tokamak in 1958, however nobody has ever managed to create a reactor that is ready to put out extra power than it takes in.

One of many essential hindrances has been how you can deal with a plasma that is sizzling sufficient to fuse. Fusion reactors require very excessive temperatures — many occasions hotter than the solar — as a result of they should function at a lot decrease pressures than the place fusion naturally takes place contained in the cores of stars. The core of the particular solar, for instance, reaches temperatures of round 27 million F (15 million C) however has pressures roughly equal to 340 billion occasions the air strain at sea degree on Earth.

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A photo of South Korea's KSTAR nuclear fusion reactor.

A photograph of South Korea’s KSTAR nuclear fusion reactor. (Picture credit score: Korea Institute of Fusion Power (KFE))

Cooking plasma to those temperatures is the comparatively straightforward half, however discovering a option to corral it in order that it does not burn via the reactor with out additionally ruining the fusion course of is technically difficult. That is normally accomplished both with lasers or magnetic fields.

To increase their plasma’s burning time from the earlier record-breaking run, the scientists tweaked points of their reactor’s design, together with changing carbon with tungsten to enhance the effectivity of the tokamak’s “divertors,” which extract warmth and ash from the reactor.

“Regardless of being the primary experiment run within the setting of the brand new tungsten divertors, thorough {hardware} testing and marketing campaign preparation enabled us to realize outcomes surpassing these of earlier KSTAR data in a brief interval,” Si-Woo Yoon, the director of the KSTAR Analysis Middle, said in a statement.

KSTAR scientists are aiming to push the reactor to maintain temperatures of 180 million F for 300 seconds by 2026.

The document joins others made by competing fusion reactors world wide, together with one by the U.S. government-funded Nationwide Ignition Facility (NIF), which sparked headlines after the reactor core briefly put out extra power than was put into it.



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