Commonwealth Fusion Systems announced a landmark supply agreement with Fujikura Ltd. for high-temperature superconducting (HTS) tape, a critical component for its high-field tokamak magnets. The agreement includes what the company describes in a press release as the largest single purchase order ever placed for HTS tape. This strategic procurement is intended to accelerate the development and construction of ARC, the first commercial fusion power plant designed by Commonwealth Fusion Systems, by securing a key element of its magnet supply chain. The HTS tape will be used to manufacture the powerful magnets that confine the plasma in the compact ARC device. Source: Commonwealth Fusion Systems
The CFS approach to fusion energy relies on magnets built from HTS tape to achieve significantly higher magnetic field strengths than conventional low-temperature superconducting magnets. This high-field capability, demonstrated in the company's 2021 SPARC magnet test which achieved a field strength of 20 T, allows for a much smaller tokamak size for a given fusion power output. The resulting high power density is central to the economic case for the ARC power plant. Securing a large-scale supply of HTS tape is a necessary step in transitioning from single-magnet demonstrations to the industrial-scale production required for a full set of ARC magnets and subsequent power plants. Source: Commonwealth Fusion Systems
The resulting high power density is central to the economic case for the ARC power plant.
This agreement builds on a multi-year collaboration between CFS and Fujikura. The HTS tape supplied by Fujikura was integral to the successful SPARC project, which provided the physics basis for ARC. The SPARC experiment itself is projected to demonstrate a net energy gain, or Q_plasma, greater than 10. By formalizing this long-term supply relationship, CFS aims to de-risk its manufacturing timeline for ARC. The move signals a maturation of the fusion industry's supply chain, shifting from research-level material acquisition to commercial-scale procurement necessary for power plant construction. Source: Commonwealth Fusion Systems
The transition to commercial fusion power requires not just scientific validation but also the establishment of robust, industrial-scale manufacturing capabilities. This purchase order represents a significant step in building out the ecosystem needed to support a fleet of fusion power plants. For the broader private fusion sector, it highlights the increasing focus on supply chain logistics and manufacturability as leading companies move from experimental phases toward commercial deployment. The ability to secure critical, high-performance components like HTS tape at scale will be a key differentiator for companies aiming to deliver fusion energy to the grid. Source: Commonwealth Fusion Systems