World's largest fusion reactor nears reality, to replicate Sun's energy
What's the story
The International Thermonuclear Experimental Reactor (ITER), the world's largest nuclear fusion experiment, is nearing completion. The project, which is based in Cadarache, France, recently received its last shipment of components needed to assemble a massive magnet at the heart of the reactor. The central solenoid was designed and developed in the US at Oak Ridge National Laboratory and is one of the most important components of this massive experimental site.
Engineering feat
What is the central solenoid?
The central solenoid is a marvel of engineering, standing at an impressive 18 meters tall and 4.25 meters wide. It consists of six individual modules, each weighing over 122.5 tons and made from six kilometers of niobium-tin superconducting cable. This is just one part of an incredibly large system dubbed "the grandest scientific experiment in the world."
Advanced technology
The tokamak and its components
ITER's tokamak, a doughnut-shaped machine designed to contain plasma with super-strong magnets, is nearly a kilometer long. At its center lies the incredibly powerful solenoid magnet, just one part of an even bigger and more complex setup. This component belongs to a magnetic system weighing 3,000 tons that interacts with nine vacuum vessel sectors.
Long-term project
Why is nuclear fusion important?
The core system of ITER has taken 15 years to develop, with each module going through a two-year cycle of manufacturing and testing. Although ITER won't generate electricity for public use, it is considered one of the world's most important research efforts aimed at unlocking commercial nuclear fusion. This process, which powers the Sun, could provide virtually limitless clean energy on Earth without producing greenhouse gases or dangerous radioactive waste.
Project timeline
A long wait for nuclear fusion
Despite the successful delivery of the solenoid, ITER is still years away from producing its first plasma. This comes nearly two decades after construction began and with costs reaching around €22 billion. However, the megaproject continues to be relevant as it could lead to invaluable scientific discoveries that would be impossible without its grand scale and funding.