# field-reversed configuration

Helion Hits 150 Million °C in Prototype Push Toward 2028 Commercial Reactor Ambition

Helion Energy says its Polaris prototype reached 150 million °C, a milestone the company frames as a three‑quarters step toward temperatures it considers necessary for commercial fusion. The firm pursues an FRC design and direct magnetic‑to‑electric conversion, targets a 50 MW Orion plant for Microsoft by 2028, and faces significant technical and fuel‑supply challenges before true commercialization.