North America · USA · Founded 2017
Zap Energy
Magneto-inertial — sheared-flow stabilised Z-pinch
Magneto-Inertial
Deuterium-Tritium
Undisclosed
Net gain late 2020s; commercial pivot incl. fission micro-reactors
Investor brief
Sheared-flow Z-pinch — fusion without magnets
Executive Summary
Zap Energy drives current directly through a linear plasma filament whose own azimuthal magnetic field provides confinement — eliminating external magnetic coils entirely. Sheared-flow stabilisation, developed at the University of Washington, tames the kink instability that historically killed the Z-pinch concept. The result is a desktop-scale fusion device that radically reduces capital cost.
Strategic Thesis
Radically lower capex by deleting expensive magnets; iterate fast on a desktop-scale plasma; bridge to revenue via SMR fission while fusion matures.
The Problem
Global electricity demand is entering an unprecedented growth phase driven by AI infrastructure, data centers, transport electrification, industrial decarbonization, water desalination, and advanced manufacturing. Solar suffers intermittency, wind capacity-factor variability, natural gas carbon emissions, conventional nuclear cost and deployment speed, and batteries energy-density and duration limits. The world requires a new source of clean, dispatchable baseload energy. Fusion represents the ultimate energy source — the challenge is making it commercially practical.
Sheared-Flow Stabilized Z-Pinch
A current pulse through a plasma column generates a self-confining magnetic field. Without stabilization, the column kinks and disrupts in microseconds. Zap's sheared-flow technique creates a velocity gradient along the column that suppresses the instability.
FuZE-3 Device
The current operating platform reached 830 MPa electron pressure and 1.6 GPa total plasma pressure in late 2025 — among the highest pressures sustained in any fusion device.
No External Magnets
Eliminating large superconducting magnets removes the single largest cost driver in most fusion architectures.
Century Commercial Pilot
Planned scale-up of the Z-pinch to commercial conditions, targeting net energy gain in the late 2020s.
Parallel SMR Fission Program
Announced in 2026 as a bridge-to-revenue strategy — Zap leverages its pulsed-power and high-current expertise into the small modular reactor market.
Fuel Strategy
Deuterium-Tritium
D-T provides the highest reactivity for the achievable plasma conditions in the Z-pinch geometry.
Product Platform
FuZE-3
Current research platform demonstrating fusion-relevant pressures.
Century
Commercial pilot Z-pinch reactor design.
Energy Conversion
Thermal (Rankine/Brayton)
Neutronic (D-T)
33–40% electrical
Deuterium-tritium fusion releases ~80% of its energy as 14.1 MeV neutrons, which deposit their kinetic energy in a surrounding blanket. The heat drives a conventional steam (Rankine) or supercritical-CO₂ (Brayton) turbine.
Conversion chain
- 1D-T plasma
- 214.1 MeV neutrons (80%) + 3.5 MeV alpha (20%)
- 3Neutrons → lithium-bearing blanket (heat + tritium breeding)
- 4Heat → steam/CO₂ turbine → electricity
The most thoroughly understood fusion fuel cycle, highest cross-section at achievable temperatures, and proven back-end engineering (steam turbines are 19th-century technology). Trade-offs: neutron-induced materials damage, tritium handling, ~33–40% Carnot-limited efficiency.
Economic Vision
By deleting expensive magnets and lasers, Zap targets the lowest capital cost per installed megawatt of any fusion architecture. The parallel SMR fission program provides a near-term commercial bridge.
Vision
Fusion power at the cost of a gas turbine.
Mission
Build the simplest possible fusion reactor that works.
Engineering Bottlenecks
- Electrode wall heat flux at high repetition
- Pinch lifetime vs. plasma compression depth
Milestone Timeline
Late 2025
FuZE-3: 830 MPa electron / 1.6 GPa total pressure
2026
New CEO; announced parallel fission SMR program
The description above reflects Zap Energy's publicly stated technology goals, roadmap and architecture. Many elements — particularly net-energy gain at scale, advanced fuel cycles, and grid-relevant economics — remain ambitious objectives that have not yet been demonstrated commercially anywhere in the fusion industry. Forward-looking statements should be treated as engineering targets, not certainties.
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Citations & Sources
Academic & financial rigor- [01]
The Global Fusion Industry in 2025
Fusion Industry Association · Jul 2025
- [02]
Company disclosures and press releases
Zap Energy
- [03]
Peer-reviewed plasma physics literature
Journal of Plasma Physics / Nuclear Fusion