Zap Energy ramps up the pressure in its latest fusion device

Zap Energy unveiled its latest fusion technology on Tuesday during a research conference in Long Beach, California. This announcement highlights the company's ongoing efforts to bring fusion energy to the commercial market, positioning itself amid a competitive landscape of startups racing to develop functional fusion power plants by the early 2030s. The newly introduced Fuze-3 device has been actively testing plasma pulses at Zap's Seattle headquarters. These experiments are crucial for shaping the design of future demonstration plants. Notably, the Fuze-3 achieved a remarkable compression of plasma, reaching over 232,000 psi (1.6 gigapascals) and temperatures exceeding 21 million degrees Fahrenheit (11.7 million degrees Celsius). This pressure milestone is significant for Zap, as it aligns with their pursuit of a specific fusion technique known as sheared-flow-stabilized Z-pinch. The reactor utilizes electrodes to channel electricity through the plasma, generating a magnetic field that, when sufficiently strong, heats and compresses the plasma to enable fusion. While these results are promising, they cannot be directly compared to those from other fusion startups due to varying methodologies employed across the industry. Achieving high-pressure plasma states is essential for any future fusion power plant to produce more energy than it consumes. To reach scientific breakeven, a benchmark achieved by only one other fusion experiment, Zap must increase its plasma pressure by at least tenfold. The company is optimistic about nearing a critical milestone set by Bob Mumgaard, CEO of Commonwealth Fusion Systems and a competitor in the field. By modifying its reactor design to incorporate a third electrode, Zap successfully set a new record for plasma pressure. Previously, the dual-electrode setup was inadequate for achieving the desired pressure levels. While Zap has not disclosed intricate details regarding the new design, spokesperson Andy Freeborn mentioned that it allows for the use of two power banks, enhancing the control over plasma behavior within the reactor. "The plasma chamber itself doesn’t look much different, but it’s operated very differently since there are two pulses of input power rather than one," he explained. Looking ahead, Zap is developing a next-generation Fuze device, expected to be operational this winter.