North America · USA · Founded 2019
Saturday, June 13, 2026
Type One Energy
Magnetic confinement — optimised stellarator
Magnetic
Deuterium-Tritium
Undisclosed
Pilot plant siting with TVA, early 2030s
Investor brief
AI-optimised stellarators sited next to existing grid infrastructure
Executive Summary
Type One Energy is a University of Wisconsin–Madison spin-off pursuing the optimized stellarator path to commercial fusion. In early 2025 the company published the world's first fully self-consistent stellarator pilot-plant physics basis — six peer-reviewed papers in the Journal of Plasma Physics covering its Infinity Two design. A partnership with the Tennessee Valley Authority sets the stage for siting at an existing utility location.
Strategic Thesis
Use modern AI-optimised coil geometry to deliver the steady-state advantages of a stellarator with tokamak-class confinement — sited next to existing TVA grid infrastructure.
Technical & Economic Profile
Architecture class
Stellarator Renaissance
3D-shaped external coils generate the entire confining field. No plasma current, no disruptions, native steady-state operation.
Reactor design
Magnetic / Stellarator — AI-optimised coil geometry
Core tech focus
Infinity Two physics basis (JPP, 2025)
Key milestones
TVA partnership for early-2030s pilot siting.
How Type One Energy sits vs peers
Accepts the burden of complex 3D coils via AI-optimised manufacturing. TVA partnership positions the company for U.S. utility pilot deployment.
Class engineering bottlenecks
- Non-planar coil geometry historically required sub-millimetre manufacturing precision — the dominant cost driver.
- Heat exhaust in non-axisymmetric 3D geometry produces localised thermal peaking that threatens divertor plasma-facing components.
- Same tritium breeding and neutron-damage constraints as the D-T tokamak class.
LCOE drivers
- Coil manufacturing precision determines unit cost — simplified-geometry approaches (Thea, Renaissance) target order-of-magnitude reductions.
- Higher capacity factor than tokamaks (no disruption downtime) materially improves LCOE.
- Liquid-metal blankets (Helical, Renaissance) double as first-wall, breeding blanket, and heat exchanger — collapsing three subsystems into one.
Sourced from the 2026 Global Fusion Energy Comparison — triple-product thresholds, direct-energy-conversion architecture, materials limits, and the LCOE / Qecon framework.
Founding Team
Type One Energy brings together a world-class coalition of stellarator physicists from the historically renowned plasma programs of the University of Wisconsin-Madison. Under the strategic commercial guidance of tech entrepreneur Randall Volberg and advanced manufacturing specialist Paul Harris, elite scientists Dr. David Anderson, Dr. John Canik, and Dr. Chris Hegna joined forces to solve the toughest roadblock in fusion: stellarator complexity. By pairing their deep academic understanding of asymmetric magnetic fields with cutting-edge 3D printing and HTS magnets, this founding team is converting historically complex physics into a manufacturable, continuous-operation stellarator.
Randall Volberg
BSc, University of Victoria; technology entrepreneur
David Anderson
PhD in Physics, University of Wisconsin-Madison
John Canik
PhD in Engineering Physics, University of Wisconsin-Madison
Chris Hegna
PhD in Plasma Physics, Columbia University; Professor, UW-Madison
Paul Harris
Advanced nuclear systems manufacturing specialist
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.
Infinity Two — Optimized HTS Stellarator
Stellarators achieve plasma confinement through complex 3D-shaped magnetic coils rather than plasma current. They run steady-state and are immune to the disruptions that threaten tokamaks. Until recently, the manufacturability of 3D coils made stellarators uncompetitive — modern AI optimization and HTS conductors have changed the calculus.
AI-Optimized Coil Geometry
Modern numerical optimization produces stellarator coil shapes that are simpler to manufacture while delivering tokamak-class confinement.
HTS Magnets
High-temperature superconducting magnets, including a 77 K HTS magnet test completed at MIT in 2025, enable the field strengths required at compact size.
Infinity One Prototype
Engineering platform de-risking magnets, vacuum vessel manufacturing and integrated control.
Infinity Two Pilot Plant
Full pilot plant design with a self-consistent physics basis published across six papers; targeted for siting with TVA in the early 2030s.
Fuel Strategy
Deuterium-Tritium
Standard D-T fuel cycle with on-site tritium breeding in the blanket.
Product Platform
Infinity One
Engineering prototype validating manufacturing and integration.
Infinity Two
First-of-a-kind stellarator pilot plant in partnership with TVA.
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
Steady-state operation eliminates the duty-cycle losses of pulsed devices, and siting at existing TVA generation locations reuses transmission interconnect, cooling, security and grid services — collapsing project finance risk.
Vision
Stellarators as the workhorse architecture of commercial fusion.
Mission
Deliver a stellarator pilot plant on the existing US utility grid.
Engineering Bottlenecks
- Manufacturing tolerances of complex 3D HTS coils
- Divertor heat handling in non-axisymmetric geometry
Milestone Timeline
2024
Acquired the Princeton/Lockheed Martin Compact Stellarator IP
Early 2025
Infinity Two physics basis published in JPP
2025
77 K HTS magnet test completed at MIT
2025
TVA partnership for pilot plant siting
The description above reflects Type One 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]
Infinity Two physics basis (6 papers)
J. Plasma Physics · 2025
- [02]
The Global Fusion Industry in 2025
Fusion Industry Association · Jul 2025
- [03]
Company disclosures and press releases
Type One Energy
- [04]
Peer-reviewed plasma physics literature
Journal of Plasma Physics / Nuclear Fusion