Realta Fusion

Realta Fusion is a fusion energy company developing compact magnetic mirror fusion generators. The company was spun out of a USD 10 million ARPA-e funded project at the University of Wisconsin-Madison in 2023. Its technology aims to provide a lower-cost and less complex path to commercially viable fusion energy generation compared to competing toroidal systems.

Realta Fusion's reactor design is based on the Wisconsin High-field Axisymmetric Mirror concept, which confines plasma into a cylindrical shape using two magnetic "mirrors" at either end. The company is applying next-generation superconducting magnets and advances in plasma stability to this relatively mature concept. Realta Fusion's compact magnetic mirror has the potential to produce net energy at smaller scales than toroidal systems, making it a promising option for industrial heat and power applications.

As of June 2023, Realta Fusion raised USD 12 million in funding, including a USD 9 million seed round led by Khosla Ventures and a USD 3 million grant from the Department of Energy's ARPA-E program. The company plans to use this funding to build its team and complete the physics design for its break-even class device, BEAM, which will be its last experimental step before designing industrial fusion energy systems.