Proxima Fusion builds quasi‑isodynamic stellarators that remove toroidal plasma currents, enabling continuous, grid‑ready fusion power. Using high‑temperature superconducting magnets and its StarFinder cloud‑based optimization platform, the company accelerates compact reactor design and reduces plant size and cost for utility operators and energy investors.
Funding
€130M raised to dateRaised to date based on public sources. This may differ from the amount the company actually raised and is based only on what is publicly available on the internet.
Founders
Product
Problem
Current large‑scale fusion approaches, such as tokamaks, require complex plasma current control and are prone to disruptive instabilities, making continuous, grid‑ready operation difficult and costly. Additionally, the lack of industrial‑scale manufacturing pathways for high‑performance magnetic systems slows the transition from laboratory experiments to commercial power plants.
Solution
Proxima Fusion develops quasi‑isodynamic (QI) stellarators that eliminate toroidal plasma currents, removing current‑driven instabilities and enabling steady‑state operation. By integrating high‑temperature superconducting (HTS) magnets, the company achieves stronger magnetic fields in a more compact geometry, reducing plant size and cost. Their cloud‑based optimization platform, StarFinder, accelerates design cycles through rapid simulation and machine‑learning‑guided prototyping. Proxima’s roadmap includes the Alpha demonstration stellarator (early 2030s) to prove net‑energy gain, followed by the Stellaris commercial power‑plant concept (late 2030s) that combines electromagnetic, structural, thermal, and neutronics models into a coherent, grid‑ready design. Partnerships with the Max Planck Institute for Plasma Physics, RWE, and a consortium of European industrial firms provide the manufacturing, engineering, and regulatory support needed to scale the technology.
Target Audience
Primary customers are utility operators and energy infrastructure investors seeking large‑scale, low‑carbon baseload power, as well as industrial partners and engineering firms that supply high‑performance superconducting magnets, cryogenics, and power‑plant construction services.
Features
- QI stellarator architecture that cancels toroidal currents, eliminating disruption risks and simplifying continuous operation
- High‑temperature superconducting (HTS) magnet system delivering higher field strength with reduced cryogenic requirements
- StarFinder cloud platform for automated stellarator geometry optimization, leveraging supercomputing and AI to cut design time and cost
- Integrated design workflow that unifies electromagnetic, structural, thermal, and neutronics simulations into a single, validated plant model
- Island divertor heat‑exhaust solution proven on W7‑X, ensuring reliable plasma‑wall interaction management
- Dedicated HTS magnet factory and supply‑chain network coordinated through the Alpha Alliance industrial consortium