SMRTR Science & EngineeringJul 16, 2026Interesting Engineering

Pulsed-power prototype completes 3,000 tests at 95% efficiency for future fusion plants

SMRTR summary

Pacific Fusion's pulsed-power prototype, called Sirius, has completed over 3,000 test shots at Lawrence Livermore National Laboratory, hitting 95% energy efficiency and delivering 60 gigawatts of power in 100-nanosecond bursts. The data gathered is already shaping larger systems, including a newer prototype 11 times bigger delivering 440 gigawatts. Backed by over $1 billion in funding, Pacific Fusion aims to achieve net fusion energy gain by 2030.

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