Canada has quietly taken a significant step forward in the global race for fusion energy. General Fusion, a Canadian company, announced that its latest compression experiments have produced approximately 600 million fusion neutrons per second at their peak, setting a record for its magnetized target fusion approach.
In layman’s terms, the company demonstrated its ability to compress a ball of ultra-hot gas with enough force and precision to ignite fusion reactions predictably. The results come from the Plasma Compression Science experiments, with data reviewed by independent scientists and published in the journal Nuclear Fusion.
Why This Record is a Game-Changer for Fusion
In fusion research, neutron production is a key performance indicator, as neutrons carry significant energy from the reaction and confirm that true fusion is occurring. During these experiments, the team achieved a peak of nearly 600 million fusion neutrons per second in a single compression shot, a figure described as a record for magnetized target fusion by leaders of the Canadian Nuclear Society, validating this concept.
Another crucial aspect is the behavior of the plasma under stress. During compression, its density increased about 190 times from its initial value, and the magnetic field holding it in place became over 13 times stronger, while the plasma remained stable instead of disintegrating, delivering repeatable bursts of fusion neutrons. Mike Donaldson, Senior Vice President for Technology Development at General Fusion, stated that the team has “demonstrated the viability of a stable fusion process” and laid the groundwork for its LM26 project.
From Experimental Science to the LM26 Fusion Machine
The Plasma Compression Science campaign aimed to answer a big question: can a collapsing liquid metal liner cleanly and symmetrically surround a spherical tokamak-style plasma? After years of testing, the experiment showed that this method of plasma compression is practical, repeatable, and capable of achieving the high densities and magnetic fields seen in the new results.
These insights are now directly translating into the Lawson Machine 26, or LM26, a larger demonstration device being built by the company in Richmond. However, while the results are promising, the path to controlled and commercially viable fusion remains challenging.
