There has been an interest in the fourth state of matter, and the U.S. Japan and Europe have joined hands to work towards the stage of abundant power. Thanks to the partnership forged by Princeton Plasma Physics Laboratory with Japan and Europe, a fusion machine was built to support all operations of ITER and to guide by providing research for all fusion power plants created after ITER. This operating tokamak, known as the JT-60SA, started as a mere experiment and has since evolved into the world’s largest fusion machine, said to produce energy enclosed at 100,000,000 ºC in the fourth state of matter.
JT-60SA indicates a forward leap for research
The system, entitled JT-60SA, is a shortened form of Japan Torus-60 Super Advanced, and this system will be online in the latter part of 2026 for a series of first-round experiments. Thus far, the JT-60SA has been a fusion experiment in Naka, Japan. This fusion machine was designed and built under the supervision of the Broader Approach Agreement between Japan and Euratom.
The idea behind this machine was to explore optimal conditions for the shape of the fourth state of matter, plasma. The experiment looked at using superconducting coils that could cool to zero fully, as well as shape plasma that was hotter than the sun. In the process, this tokamak project has broken records.
The JT-60SA has attained the Guinness World Record for obtaining plasma volumes of 160 cubic meters. This is quite the record since all prior research attempts and all prior tokamak devices could not obtain such plasma volumes.
What would 2026 mean in terms of advancing the fourth state of matter?
While the JT-60SA had produced its very first plasma in late 2023, the mission of taking plasma production forward will be escalated in October 2026. This year will be the year of the full-scale experimental campaign after many years of research, experimenting, and testing. Upgrades have been done over the years, with teams from Japan and Europe involved in the technical side of the project. These teams have installed heating systems and the ports deemed necessary to conduct experiments.
This year will see the start of a series of plasma experiments with hydrogen isotopes being energized to produce high-temperature plasma as well. With such experiments on the cards, the idea is to:
- Look at plasma behavior, particularly in future reactors like DEMO.
- Test methods for high-pressure plasma.
- Provide data directly derived from the operation of the plasma project.
Now that the construction of the tokamak is complete, the next step would be to guide scientific discovery that could further shape energy systems.
Overcoming engineering hurdles along the way
Firstly, when it comes to fusing atoms, environments for maintaining must be so extreme since traditional sensors would end up melting. Superconducting magnets will provide the magnetic field required to confine the plasma, whilst operating continuously without losing energy. Scientists would need to ensure stability within the tokamak to prevent any other disruptions.
The JT-60SA is known for being an upgraded version of the JT-60U tokamak, or more fondly, the artificial sun, defying the laws of the universe. This upgraded tokamak enabled the optimization of the plasma’s shape. With the JT-60SA, the plasma created was more triangular in shape to improve confinement. Furthermore, this upgraded machine would be able to test different scenarios since it will operate in different divertor configurations.
A future of unlimited energy guided by plasma
The fourth state of matter may spell infinite and unlimited energy once scientists figure out how to tame plasma properly. Thanks to the international collaboration between Europe, Japan, and the U.S., the JT-60SA signifies how, with collaboration, scientific complexities can be overcome.
This machine is ready to start its scientific journey in the latter part of 2026. For now, we can only assume that much valuable data will be gained from this project, and that this data will assist with future fusion control systems. Furthermore, the knowledge accumulated by experimental attempts will support ITER too, and not just the JT-60SA. With the 100,000,000°C for plasma promise, the world is reimagining infinite energy.