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Thursday, September 17, 2026
Realta Fusion — Technical Profile & Analysis
Deep-dive assessment of the HTS tandem magnetic mirror (WHAM → Anvil pilot) architecture, fuel path, and market positioning.
Confinement & Reactor
Magnetic (HTS tandem magnetic mirror (WHAM → Anvil pilot))
Fuel Strategy
Deuterium-Tritium (D-T)
Engineering Moat
High-temperature superconducting magnets enabling a simple linear mirror geometry; near-term industrial process heat then electricity.
Commercial / Funding Profile
≈ $36M Series A (2024) + ARPA-E
Technology Assessment & Commercial Milestones
Spun out of the University of Wisconsin–Madison with ARPA-E backing, Realta Fusion is reviving the magnetic mirror concept using high-temperature superconducting (HTS) magnets. Founded by UW physicist Cary Forest and Kieran Furlong, the company is building an advanced tandem mirror targeting zero-carbon industrial heat first, then electrical generation.
Key bottlenecks: end-loss suppression in the tandem mirror configuration and HTS magnet fabrication at production scale. WHAM (Wisconsin HTS Axisymmetric Mirror) achieved first plasma in 2024 following a $36M Series A led by Khosla Ventures.
Investors include Khosla Ventures, ARPA-E, Future Ventures, and TitletownTech.
Latest coverage — Realta Fusion
- IndustrySep 13, 2026Fusion sector
Madison utility, energy startup to explore new fusion power plant
Realta Fusion has initiated a collaboration with a southern Wisconsin utility to evaluate potential sites for a 200 MWe commercial fusion power plant based on a compact mirror confinement concept.
- FundingAug 15, 2023Fusionhub
Fusion Startup Spotlight: Realta Fusion
Realta Fusion, a University of Wisconsin-Madison and MIT spin-off, has secured ARPA-E funding to develop high-field, compact stellarators using second-generation high-temperature superconducting tapes.
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Use our global network to request a direct technical briefing on Realta Fusion and adjacent programs working on HTS tandem magnetic mirror (WHAM → Anvil pilot).