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Helion Energy announced achieving a plasma temperature of 150 million degrees Celsius and becoming the first private venture to test fusion with tritium fuel. The company is building a commercial fusion power facility in Eastern Washington, aiming to start operations in 2028.

Its Polaris prototype, which reached the new temperature, is part of ongoing tests to validate Helion's fusion technology. The company plans to transition to using deuterium and helium-3 for more efficient electricity production. Helion is advancing rapidly in the fusion sector, supported by significant investments.