A new record has just been smashed in the realm of nuclear fusion. The scientific fraternity of France—and indeed the entire region of the world referred to as the West— is celebrating while the Chinese nurse their disappointment. A team of scientists manning a complex machine called WEST, which is installed in southern France, conducted a plasma experiment that concluded with phenomenal results. Not only did they achieve exactly what they set out to and more, but they toppled a result that had put China at the top of the plasma game not that long ago.
French scientists have set a new standard in nuclear fusion, China weeps
A machine called the WEST (W Environment in Steady-state Tokamak) has blown the nuclear community out of the water with a giant leap forward in our knowledge of plasma. The aim of this sector of science is to maintain stable plasma (ionized gas), which means sustaining a controlled, high-temperature state within a fusion reactor for an extended period without disruption or instability.
The previous record for the longest period of stable plasma achieved by a tokamak was set by a Chinese research team with their plasma machine called—you guessed it—the EAST (Experimental Advanced Superconducting Tokamak) not long ago in January 2025. Also known as the Artificial Sun, it set the world record for stable, superheated plasma at 1,066 seconds, or 17 minutes and 46 seconds. This amazing achievement surpassed its own record of 403 seconds, which was set in 2023.
WEST is the new plasma record holder
Enter WEST, which smashed EAST’s plasma duration just a few weeks later with 1,337 seconds, or 22 minutes and 17 seconds, on February 12, making it the new holder of the global record for sustained, stable plasma. This beat the Chinese time by 25%, clearly marking the WEST as the most superior nuclear fusion device—for now.
In the short-term future, the WEST team will increase their efforts to achieve much longer plasma durations of up to several hours. But they also to heat the plasma to even greater temperatures if they hope to approach the conditions expected in nuclear fusion plasma.
There’s great competition between WEST and EAST, naturally
As evidenced by the nuclear fusion tokamaks’ names, the competition between the Asian EAST and European WEST is intense. WEST belongs to the Commissariat à l’Énergie Atomique et aux Énergies Alternatives, or CEA (French Alternative Energies and Atomic Energy Commission) and is installed in Cadarache, France. EAST is owned by the Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP).
All eyes are on the respective research teams as the scientific fraternity waits to see who’s next to level up with their maintained plasma duration.
What are the implications of increased stable plasma duration?
The reason for such a massive focus on plasma in the science world is its energy potential, and the goal is to control this naturally unstable phenomenon. It’s vital to ensure that the components that contain plasma can withstand radiation without the risk of pollution or malfunction, either of which could have catastrophic consequences.
Anne-Isabelle Etienvre, Director of Fundamental Research at the CEA, expressed her confidence that the latest WEST tokamak results are only the beginning:
“WEST has achieved a new key technological milestone by maintaining hydrogen plasma for more than twenty minutes through the injection of two megawatts of heating power. Experiments will continue with increased power. This excellent result allows both WEST and the French community to lead the way for the future.”
Considering the considerable and complex infrastructure required to produce nuclear energy on a large scale, it is unlikely that fusion technology will make any significant contribution to achieving net-zero carbon emissions by 2050, which is a goal that most first-world countries are aiming for. But it’s still extremely promising for the future and we may well see nuclear energy becoming one of the main sources of renewable power in our lifetimes.