Helion’s Polaris prototype has become the first privately funded machine to demonstrate clearly measurable deuterium–tritium (D‑T) fusion and to reach 150 million °C plasma temperatures, marking a major but still early milestone on their path toward a commercial generator for the Microsoft PPA around 2028. Helion reports that its 7th prototype, Polaris, has achieved measurable ...

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Link :
https://www.nextbigfuture.com/2026/02/helion-hits-150-million-degrees-celsius-and-achieves-d-t-fusion.html