Proxima Fusion has closed a €7 million pre-seed financing round to advance its design for a new generation of stellarator fusion devices. The round was co-led by Pluralis and UVC Partners, with participation from High-Tech Gründerfonds and the Wilbe group. This capital will support the initial engineering design phase for a device leveraging quasi-isodynamic (QI) optimization principles and high-temperature superconducting (HTS) magnets. Proxima emerges from the Max Planck Institute for Plasma Physics (IPP), the organization operating the Wendelstein 7-X (W7-X) stellarator, providing the new company with a deep foundation in advanced stellarator physics and engineering. Source: Proxima Fusion

The company's technical approach aims to build upon the successes of the Wendelstein 7-X experiment in Greifswald, Germany. W7-X is the world's most advanced stellarator, designed to demonstrate optimized plasma confinement in a complex, non-axisymmetric magnetic geometry. This design inherently avoids the large, disruption-prone plasma currents required for confinement in tokamaks, offering a potential path to true steady-state operation. Proxima intends to integrate the plasma physics validated by W7-X with modern computational design tools and the engineering advantages of HTS magnets, which enable stronger magnetic fields and more compact, efficient device architectures. Source: Proxima Fusion

The company's technical approach aims to build upon the successes of the [Wendelstein 7-X](/programs/wendelstein-7-x) experiment in Greifswald, Germany.

Proxima's strategy focuses on developing a QI stellarator, a specific configuration that minimizes neoclassical transport and improves alpha particle confinement—a critical factor for achieving ignition in a deuterium-tritium fuel cycle. By combining QI principles with the engineering freedom afforded by HTS coils, the company aims to overcome historical stellarator challenges related to complex coil manufacturing and performance optimization. This funding represents a significant step for the commercialization of stellarator technology, a concept that has seen less private investment compared to the more common tokamak approach but is gaining traction due to its favorable steady-state characteristics. Source: Proxima Fusion

The €7 million in capital positions Proxima Fusion to complete foundational design work and expand its team of physicists and engineers. The immediate goal is to produce an integrated design for a new device, rather than commercializing W7-X directly. This initial phase will be critical for validating the engineering and economic viability of their QI-HTS concept before pursuing subsequent, larger funding rounds required for construction. The company's progress will be closely watched as a key indicator of the commercial maturation of stellarator-based fusion energy within the growing private fusion ecosystem. Source: Proxima Fusion