VANCOUVER, British Columbia, March 24, 2026 (GLOBE NEWSWIRE) -- General Fusion Inc. (“General Fusion” or the “Company”), a leader in the global race to commercialize fusion energy, today announced a new peer-reviewed publication in the scientific journal Fusion Science and Technology demonstrating a key diagnostic system for measuring temperature milestones in its world-first, large-scale Lawson Machine 26 (“LM26”) fusion demonstration machine. The Company previously announced its plans to go public through a business combination (the transactions contemplated by the business combination, collectively, the “Proposed Business Combination”) with Spring Valley Acquisition Corp. III (NASDAQ: SVAC) (“SVAC”).
General Fusion’s LM26 is designed to reach target temperatures of 1 keV (10 million degrees Celsius) and 10 keV (100 million degrees Celsius) and ultimately achieve the Lawson criterion, demonstrating the Company’s Magnetized Target Fusion (“MTF”) technology in a commercially relevant way. In LM26, temperature analysis will draw on multiple diagnostics, including ion temperature measurements through neutron counting. The new peer-reviewed research in Fusion Science and Technology outlines the Company’s advancement of this diagnostic method for its MTF approach.
“Ion temperature is a key parameter for fusion performance in our LM26 program,” said Mike Donaldson, Senior Vice President of Technology Development at General Fusion. “Our work demonstrates a practical, scalable method to measure ion temperature using neutron counting. As we move toward 1 keV and beyond, this technique will be an important tool for validating plasma performance in LM26.”
General Fusion has more than 20 years of experience designing, building, and testing fusion prototypes and testbeds. The publication in Fusion Science and Technology highlights General Fusion’s deep expertise in developing fusion diagnostics for MTF and builds on work from PI3, the world’s largest and most powerful operational fusion plasma injector, now integrated into LM26. Temperature measurements from LM26 will also be supported by data from absolute extreme ultraviolet (AXUV) diodes measuring electron temperature. The machine’s comprehensive diagnostic suite further includes magnetic sensors, neutron detectors, spectroscopy, and laser-based systems.
Quick Facts:
- General Fusion’s MTF is designed to solve significant barriers to commercializing fusion energy at a time when electricity demand is surging, and nations around the world are racing to commercialize fusion power.
- As a technology, MTF aims to achieve fusion in a practical way, avoiding superconducting magnets and high-powered lasers, while enabling the use of existing materials for durable machines that would produce cost-effective energy.
- In early 2025, General Fusion announced that it had designed, built, and begun operating its world-first LM26 fusion demonstration machine in under two years. LM26 is the first MTF demonstration machine to be built at a commercially relevant scale. It mechanically compresses plasma with a lithium liner at 50% commercial-scale diameter.
- LM26 aims to achieve key fusion technical milestones: plasma heating to 1 keV (10 million degrees Celsius), then 10 keV (100 million degrees Celsius), and ultimately the Lawson criterion, the combination of fusion parameters that can produce net fusion energy in the plasma.
About General Fusion
General Fusion is pursuing a fast and practical approach to commercial fusion energy and is headquartered in Vancouver, Canada. The Company was established in 2002 and is funded by a global syndicate of leading energy venture capital firms, industry leaders, and technology pioneers. Learn more at www.generalfusion.com. General Fusion announced in January 2026 that it plans to go public through the Proposed Business Combination with Spring Valley Acquisition Corp. III (NASDAQ: SVAC).
About Spring Valley Acquisition Corp. III
Spring Valley Acquisition Corp. III is a part of a family of investment vehicles formed for the purpose of acquiring or merging with a business focused on the Power infrastructure and Decarbonization sectors. Over the past 5 years, Spring Valley has raised $920 million in four IPOs. Spring Valley I successfully completed its business combination with NuScale Power, a leading U.S. small modular reactor (“SMR”) technology company, and Spring Valley II successfully completed its business combination with Eagle Nuclear Energy Corp., a next-generation nuclear energy company with rights to the largest open pit-constrained measured and indicated uranium deposit in the United States. SVAC maintains a corporate website at https://sv-ac.com.
