From foundational science
to fusion on the grid
Stellarex advances fusion through a milestone‑driven, staged program — from foundational discoveries and IP through partnerships, prototypes, and demonstration devices.
Below: our path from 2021 to 2032, culminating in the SX0 demonstration of net energy gain (Q > 1).
Foundations of the Stellarex approach
Since 2021, Stellarex has assembled the science, intellectual property, funding, and partnerships that underpin our fusion program — from Princeton’s stellarator optimization breakthroughs to a Canadian public‑private partnership.
Germany's Wendelstein 7‑X confirms stellarator computer optimization.
Princeton spin‑out incorporated.
Foundational IP filed.
APS honors Dr. Bhattacharjee.
Major federal funding secured.
Partnership with Savannah River National Laboratory.
Operation begins at PPPL.
University licensing agreement.
Helium‑3 patent filed — core IP position secured for fusion power.
Canadian program launched.
Public‑Private Partnership:
AECL, CNL, OPG, Stellarex.
A staged roadmap through 2032
Two device programs — SXA (intermediate prototype) and SX0 (net‑energy demonstrator) — run in parallel from 2026 through 2032, anchored by the launch of the Centre for Fusion Energy.
PHASE 1 · ENGINEERING
Detailed engineering of the SXA intermediate stellarator: coil geometry, plasma modeling, systems integration studies.
Location: Greater Toronto Area
PHASE 2 · BUILD
Fabrication and assembly of superconducting coils, vacuum vessel, and support systems for the SXA prototype.
Coils: Superconducting · High field
PHASE 3 · RESEARCH & TESTING
First plasma. Validates simplified stellarator design at moderate power — de‑risking SX0 scale‑up.
Power: Moderate · Research grade
PHASE 1 · FULL‑SCALE ENGINEERING
Full‑scale demonstration device design informed by SXA data. Blanket, tritium breeding, and Q > 1 physics.
Fuel: H‑D / T‑D plasma
PHASE 2 · BUILD
Fabrication of the SX0 demonstration device at a national‑facility site. Full superconducting magnet system.
Site: Nation’s fusion facility
PHASE 3 · THE DESTINATION
First plasma at Q > 1 — net energy gain demonstrated for the first time from a stellarator.
Milestone: Q > 1 — Net energy gain
SXA — Intermediate prototype device (2026‑2029). Superconducting coils, high magnetic field, moderate power.
SX0 — Demonstration device (2026‑2032). Full‑scale plasma, H‑D / T‑D fuel, targeting Q > 1.
BEYOND 2032