North America · USA · Founded 2017
Saturday, June 13, 2026
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.
Technical & Economic Profile
Architecture class
Magneto-Inertial, Pulsed & Alternative Cores
Pulsed compression schemes that explicitly avoid massive static superconducting magnets, prioritising upfront-capex reductions and modular replicability.
Reactor design
Magneto-Inertial / Sheared-Flow Z-Pinch
Core tech focus
Sheared axial flow for kink stabilization
Key milestones
FuZE-3 achieved 1.6 GPa total pressure (late 2025). Net gain targeted late 2020s.
How Zap Energy sits vs peers
Magnet-free sheared-flow Z-pinch. Has demonstrated > 1.6 GPa total plasma pressure — the most direct evidence that an ultra-low-capex magnet-free architecture is viable.
Class engineering bottlenecks
- Pulsed-rep-rate engineering: sustaining 1–10 Hz operation with millisecond-scale energy recovery.
- For aneutronic FRC (TAE), bremsstrahlung scales as Pbrems ∝ Tₑ^½, capping Pfus/Pbrems at ~0.2–0.3 without non-thermal ion distributions.
- For MTF (General Fusion), liquid-metal vortex stability under pneumatic shock and synchronisation of dozens of pistons.
- For sheared-flow Z-pinch (Zap), maintaining kink-stability at commercial pulse repetition rates.
LCOE drivers
- Elimination of large superconducting magnet assemblies removes the single largest capex line in tokamaks.
- Direct-conversion architectures bypass the 35–40% Rankine/Brayton thermodynamic ceiling, pushing net plant efficiency past 60–70%.
- Liquid-metal first-walls (General Fusion) eliminate first-wall replacement cycles entirely.
Sourced from the 2026 Global Fusion Energy Comparison — triple-product thresholds, direct-energy-conversion architecture, materials limits, and the LCOE / Qecon framework.
Founding Team
Zap Energy is the commercial materialization of a breakthrough discovery made inside the research labs of the University of Washington. Nuclear engineering professors Dr. Uri Shumlak and Dr. Brian Nelson successfully proved that a dynamic, sheared-flow current could stabilize a Z-pinch plasma column, preventing it from collapsing without the need for massive, costly external magnets. Recognizing the massive economic advantage of a reactor that replaces magnetic coils with raw electrical currents, they teamed up with tech executive Benj Conway in 2019. Together, they have built an agile company dedicated to making the lowest-cost, most compact fusion reactor on the market.
Benj Conway
MBA, University of Oxford; BA, Williams College
Brian A. Nelson
PhD in Nuclear Engineering, MIT; Professor Emeritus, University of Washington
Uri Shumlak
PhD in Nuclear Engineering, UC Berkeley; Professor, University of Washington
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