Pacific Fusion reports 440 GW milestone in pulser module scale-up

More than 1,000 qualification shots later, Pacific Fusion’s pulser module prototype had proved the case for factory-built fusion

(Image courtesy of Pacific Fusion)

Pacific Fusion has completed its second set of technical milestones, validating a scaled prototype of the pulser module at the heart of its fusion system. The prototype, roughly one-third the size of a full module, delivered approximately 440 GW of peak output power at approximately 1.1 MV in an 80-nanosecond pulse. The results keep the company on track to achieve net facility gain by 2030.

Pacific Fusion pulser module hits record power output

Pacific Fusion says the scaled prototype is the highest-power single-step pulser module ever demonstrated. The company describes its architecture as the highest peak power impedance-matched Marx generator ever developed, with 90 bricks arranged across nine stages and approximately two-nanosecond timing jitter. Validation ran to more than 1,000 qualification shots, with results compared continuously against simulation models. Each full module is shipping-container-sized and designed to deliver more than a terawatt of peak power in a pulse lasting around 100 nanoseconds. The module charges from a standard wall connection using roughly twice the energy needed to charge a laptop, then fires without intermediate pulse compression or additional energy storage stages. The full Pacific Fusion system calls for 156 such modules firing in tightly synchronised pulses to compress a small fuel target and release fusion energy. A validated low-cost trigger system was among the critical components confirmed during testing. The trigger synchronises all stages into a single coherent pulse, which Pacific Fusion describes as a key requirement for scaling to full system performance. The prototype also served as a testbed for vacuum insulators, reducing supply chain risk ahead of production.

Modular design built for industrial scaling

Pacific Fusion frames the pulser module as a departure from how research-grade fusion hardware has traditionally been built. Rather than custom-built research machines, modules are designed for factory replication using common materials including steel, aluminium, plastic, oil, and water. The company says this approach supports manufacturing at scale, simplifies maintenance, and allows supply chains to grow alongside production. The modular architecture also extends beyond fusion. Modules can be configured individually to produce x-ray, neutron, combined environment, microwave, and electromagnetic pulse outputs for a variety of testing applications, providing a platform that supports national security missions during the company’s scale-up phase.

Next steps toward a full-scale pulser module

Pacific Fusion’s next declared milestone is the completion and validation of a production-scale module, which the company says is on track for delivery later this year. Manufacturing operations for the remaining 155 modules are scaling in parallel. The company is establishing what it describes as the world’s first fusion assembly lines, beginning at its San Leandro Build Centre in California and expanding to its Los Lunas Build Centre in New Mexico before year-end. The scaled prototype results follow Pacific Fusion’s first milestone set, which the company completed ahead of schedule. With a team now exceeding 200 scientists, engineers, and builders across facilities in Fremont and San Leandro, the company positions the current validation as one step in a continuing series of risk-reduction milestones on the path to deployable fusion power.

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