SMRTR TechAug 31, 2025Interesting Engineering

Deep fueling pellet injector from US lab powers nuclear fusion record breakthrough

SMRTR summary

Oak Ridge National Laboratory's fuel pellet injector enabled a fusion energy breakthrough at Germany's Wendelstein 7-X stellarator, sustaining high-performance plasma for 43 seconds. The system shoots frozen hydrogen pellets into the plasma core, increasing density compared to edge gas injection. This addresses a key limitation in fusion research and represents progress toward practical fusion energy production.

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