Scroll Top

China’s EAST nuclear fusion reactor smashes two world records



Fusion has always been seen as the energy of the future, and slowly it’s getting closer.


Love the Exponential Future? Join our XPotential Community, future proof yourself with courses from XPotential Universityconnect, watch a keynote, or browse my blog.

Around the world the quest to create the world’s first commercial nuclear fusion reactor is gathering momentum, and now China’s “artificial sun” Tokamak has sustained a plasma reaction for a whopping 101 seconds at 120 million degrees Celsius and set new records. And, as is always the hope in a world where fusion is always “just around the corner,” it’s hoped that the breakthrough will one day pave the way for a carbon-neutral energy future.


This pyramid shaped lens eliminates the need for solar panels to track the Sun


EAST, which stands for Experimental Advanced Superconducting Tokamak, or HT-7U, is a custom-built fusion reactor that has operated in different phases since 2006. Like many of the world’s tokamak experiments, EAST has reached fusion before. As a refresher, inside the donut-shaped, or sometimes more spherical, containment of a tokamak, sun-hot plasma swirls in a circle that’s held in place by supercooled electromagnets.

This magnetic field is the only thing floating between 360-million-degree plasma and a bunch of human-made materials that obviously can’t sustain that temperature. The plasma results from smashing different nuclei together, fusing them rather than splitting them.

This requires a huge energy investment, which critics say means fusion will never really get off the ground. And so far, all tokamaks work for just a scant few seconds at lower temperatures before something goes wrong.


Komatsu unveils its 250 ton autonomous dump truck for strip mines


This is why EAST – which was turned on last December – running for 101 seconds at 120 million Celsius is such a huge deal. It’s a double whammy: a very long runtime at an extraordinarily high temperature. In 2018, the tokamak reached 180 million degrees Fahrenheit, or about 82 million degrees Celsius. But back then, EAST could only sustain the plasma for around 10 seconds.

That’s not hot enough or long enough, but 120 million degrees Celsius and 101 seconds, which EAST achieved in late May, certainly are. So, this is a record for both the required power-generating temperature and the duration for keeping the temperature at a stable level.

Why does the temperature have to be so extraordinarily hot? The Sun, after all, operates at “just” 15 million degrees Celsius. But it also has a huge advantage because of its enormous size, getting an assist from gravity that helps to smash its atoms together. Instead of using gravity, Earthbound tokamaks must heat to many millions more degrees in order to make the atoms amenable to the smash.


Innovative Ocean Battery stores renewable energy at the bottom of the deep sea


While the artificial sun’s new record is great, it’s still a very long way from a self-sustaining plasma reaction, or “ignition.” That will involve likely even higher temperatures that are held for a much longer time.

As for other high-profile reactors around the world, the UK’s MAST reactor recently made headlines with a new exhaust system that reduces heat 10 times better than its predecessor. In the meantime, the global International Thermonuclear Experimental Reactor, or ITER, is on track to build the hugest tokamak ever, with first plasma projected in 2030. Each experimental reactor has goals to help push technology forward to help all the others.

The future of EAST could involve lessons learned by ITER, South Korea’s KSTAR reactor, which held the previous fusion record, MAST, and even private tokamak researchers that are chipping away at the major obstacles to fusion energy. All have the same goal: to sustain an extremely hot reaction and keep their equipment safely running for as long as possible.

Related Posts

Leave a comment


1000's of articles about the exponential future, 1000's of pages of insights, 1000's of videos, and 100's of exponential technologies: Get The Email from 311, your no-nonsense briefing on all the biggest stories in exponential technology and science.

You have Successfully Subscribed!

Pin It on Pinterest

Share This