Hephaestus Exits Stealth Having Raised $17.2M to Supply Rare-Earth-Free HTS Superconductors and Build Low-Cost Fusion Power

LONDON, Oct 22 (Bernama) -- Hephaestus today emerged from stealth with solutions that address two of the largest cost drivers in fusion power: the high temperature superconducting (HTS) magnets that confine the plasma, and the edge-localized modes (ELMs – major plasma instabilities) that drive up the cost and complexity of conventional reactor designs. The company also announced the close of a new funding round led by CiRi Ventures.

Hephaestus was founded in London in 2019 with a single mission – to help make fusion energy cheap enough to compete on the grid. Its AI plasma solver initially swept the full space of tokamak design parameters, unconstrained by the legacy designs and materials much of the industry is already committed to, and identified negative triangularity (NT), which inverts the D-shaped plasma used in most tokamaks, as the most likely configuration for low-cost fusion energy.