Simulation & Rapid Prototyping

QI-Stellarator

Stellarators were exceedingly difficult to design in the past, until the advent of supercomputing.



The vast number of free parameters in stellarator designs used to make them impossible. No more.

Our cloud-based stellarator optimization and design framework, StarFinder, allows us to rapidly iterate on QI stellarator designs at lower costs and higher speed than ever before.

High-Temperature Superconductors

High Temperature Superconductors (HTS)

Superconducting materials have zero electrical resistance, and have been revolutionizing magnet technology for decades.

But conventional superconductors require extremely low temperatures, near absolute zero.

Modern high-temperature superconductors (HTS) can reach higher temperatures and magnetic field strengths while also having significantly wider design space, leading to less strict requirements for fusion devices.

HTS technology is at the forefront of leading tokamak developments—but it's equally attractive for stellarators, which are less constrained by current-driven operational limits.

QI-HTS Stellarators

QI-Stellarator

Proxima Fusion is developing quasi-isodynamic (QI) stellarators, a magnetic confinement approach in which toroidal currents cancel out to zero, resulting in uniquely robust features.

W7-X is an invaluable prototype and testbed for this concept.



The scientific basis for QI stellarators has been spearheaded by our partners at the Max Planck Institute for Plasma Physics (for example, Helander & Nührenberg, PPCF 2009 and Goodman, Xanthopoulos, Plunk et al., PRX Energy 2024).

We believe that QI stellarators using high-temperature superconducting (HTS) magnets offer the clearest path to putting fusion on the grid.


In the absence of toroidal plasma currents, current-driven instabilities can be completely eliminated, together with the risk of disruptions that can occur in tokamaks and other stellarator concepts.

QI-HTS stellarators like Proxima's first-of-a-kind fusion power plant concept, Stellaris, also offer a proven heat exhaust concept: the island divertor, which was demonstrated on W7-AS and W7-X at the Max Planck Institute for Plasma Physics.