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China has fired up the world's largest superconducting magnet for nuclear fusion. Built for the CRAFT "artificial sun" project in Hefei, the toroidal-field coil weighs 582 tonnes, stores three times the energy of the equivalent magnet at the international ITER reactor, and is designed to trap a plasma hotter...

15,770 views • 6 days ago •via X (Twitter)

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Here we go… This is the moment our ST40 centre column is lifted out. A bit like open-heart surgery on a tokamak. It’s a delicate operation, and a huge milestone for ST40. The centre column has had a tough life, acting as the core of the toroidal magnetic field coil in the world’s highest-field spherical tokamak. After more than 5,000 plasma pulses, it has helped generate magnetic fields above 2 Tesla at the plasma core, confining plasma at temperatures of more than 100 million °C, the threshold for #fusion. Next up, we install the new and improved centre column built by our partners at The Rockwood Group. This is all part of ST40’s major upgrade programme with U.S. Department of Energy and Department for Energy Security and Net Zero, helping transform it into one of the most reactor-relevant fusion devices in the world. What began as an experimental tokamak is becoming something much bigger: a customer testbed for the technologies and expertise needed to put #fusionenergy onto the grid⚡ And for anyone wondering what the centre column actually does… 👇 It forms the inner limb of each turn of the toroidal field coil. Its 24 wedges each carry up to 200 kA of current, generating the powerful magnetic fields needed to confine the plasma. Wrapped around the wedges, a 192-turn central solenoid helps drive and sustain the plasma current, after merging-compression start-up. An impressive piece of equipment with an equally impressive track record! #Fusion #FusionEnergy #Innovation

Tokamak Energy

28,462 views • 1 month ago

Elon Musk just exposed the most catastrophic energy blindspot in the entire AI arms race. The West is still debating which twigs to burn. China is capturing the sun. Musk: “People just don’t understand how solar is everything. Compared to the sun, all other energy sources are like cavemen throwing some twigs into a fire.” Every natural gas plant. Every nuclear reactor. Every experimental fusion project being debated in Washington right now. Twigs. Musk: “We have a giant free fusion reactor that shows up every day. It’s farcical for us to create little fusion reactors.” And then he gave the most clarifying statistic in the entire energy debate. Musk: “The sun is over 99.8% of all mass in the solar system. Jupiter is around 0.1%. So even if you burnt Jupiter, the energy produced by the sun would still round up to 100%.” Musk: “And then if you teleported three more Jupiters into our solar system and burnt them too, it would still round up.” The sun is not an energy source. It is the only energy source. Everything else is rounding error. China already knows this. While American tech executives beg for permits to build natural gas plants, China crossed 1,000 gigawatts of installed solar capacity in 2025. More than the rest of the world combined. They are not holding summits about it. They are not commissioning reports about it. They are building it. Harvesting the free fusion reactor that arrives every morning at zero cost and feeding it directly into their AI data centers. The AI race is not an algorithm race. It is an electro-industrial race. You cannot build superintelligence without infinite compute. You cannot have infinite compute without infinite energy. And right now, the United States is losing the energy war while holding committee meetings about which twigs to burn next. China built the energy-compute flywheel. Cheap, scalable, infinite solar power feeding AI models at a fraction of the cost. Compounding every single day. The nation that captures the sun’s output will hold a permanent monopoly on global intelligence. The nation that doesn’t will spend the next decade trying to understand how it lost. Everyone else gets left holding the twigs.

Dustin

47,011 views • 5 months ago