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More funding for fusion: Seattle startup lands $160M and reveals technology breakthrough

Seattle-area startup Zap Energy is edging closer to the promise of fusion power. The company Wednesday announced two milestones: its newest prototype device has created plasma, a superheated gas needed to generate fusion, and it raised $160 million in new funding with support from Bill Gates’ Breakthrough Energy Ventures and two petroleum giants.

Zap Energy, which has offices in Everett and Mukilteo, Wash., has raised a total of roughly $200 million since launching in 2017.

 Nuclear fusion — a carbon-free, infinite source of power that’s safer than atom-splitting fission — has for decades been the Holy Grail of the energy sector. The ultimate fusion reactor is the sun. Hobbyists, including even a middle school student, can create fusion reactions.

But the hurdle that has so-far proved insurmountable is generating sustained fusion in a system that produces more energy than it requires to operate, and efficiently captures the energy that’s released.

Ventures worldwide are tackling fusion with a range of devices from the size of a large shoe box to the massive International Thermonuclear Experimental Reactor (ITER) in France. Zap Energy embraces a smaller, simpler technology that uses a sheared-flow-stabilized Z pinch to create plasma. The approach avoids the need for superconducting magnets and high-powered lasers.

The breakthrough: Zap Energy last week created plasma in the FuZE-Q, its fourth generation Z-pinch device. Now it needs to crank up the current that runs through it to achieve “breakeven” — the point at which it generates more power that it uses.

The company estimates that it needs to produce 650 kA (kiloampere) of current to get there. At this point they’ve reached 500 kA, which represents significant progress. When the team got its start at the University of Washington, they were producing about 50 kA (a bolt of lightning, by comparison, is about 30 kA).

Zap Energy is building a new supercapacitor bank that will be capable of generating pulses of electricity reaching 1,000 kA. Construction should be done by the end of the year.

But even that accomplishment doesn’t ensure success. The system needs to keep scaling up, which can tweak the physics in unexpected ways that alters the plasma’s confinement, compression and stabilization.

If the team hits difficulties, they can modify the setup and try again. The new cash creates a longer runway depending on how the technology performs with higher currents.

“They’re one of the earliest to get close to achieving this [breakeven] goal in the private sector,” Hansen said. “They could be on the verge of a really breakthrough demonstration.”

The founders: Zap Energy was co-founded by UW professors Uri Shumlak and Brian A. Nelson with technology developed in collaboration with researchers at Lawrence Livermore National Laboratory. The third founder is entrepreneur and investor Benj Conway. The company has more than 60 employees.

The funders: Zap Energy’s latest round was led by Chris Sacca’s Lowercarbon Capital with participation by new investors including Breakthrough, Shell Ventures, DCVC and Valor Equity Partners. Existing investors who likewise participated include Addition, Energy Impact Partners and Chevron Technology Ventures.

Zap energy has reached new levels of success and has potential to grow even more. My best wishes to the entire team of Zap Energy and congratulations on funding.

Shishir Gupta CEO & Founder Startuplanes

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