HH70 (Energy Singularity)

HH70 is Energy Singularity's compact tokamak in Shanghai, the world's first fully high-temperature-superconducting (HTS) tokamak, which achieved first plasma in June 2024. In early 2026 it ran steady-state long-pulse plasmas of up to 1,337 seconds.

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Current state

Notes

Funding: company announced ~RMB 400m seed (2022) and ~RMB 400m Pre-A (2023); cumulative total not stated, so private funding raised not recorded. Pulse-length claims are company-reported; plasma parameters not stated. Experiments use hydrogen/deuterium (fuel field approximate).

Timeline

• 2024-06-18 — HH70 achieved first plasma as the world's first fully HTS tokamak. (source)
• 2024-12-31 — HH70's toroidal magnetic field exceeded 1 tesla. (source)
• 2026-01-07 — HH70 sustained 120 seconds of steady-state plasma. (source)
• 2026-02-02 — HH70 reached 1,337 seconds of steady-state long-pulse plasma operation. (source)

The timeline is append-only: corrections are added as new entries. Stated targets appear in the current-state table, never as milestones.

Related projects

• ARC (Commonwealth Fusion Systems) Design · United States
• BEST (Burning Plasma Experimental Superconducting Tokamak) Under construction · China
• CFEDR / China Fusion Energy Co. demo reactor (successor to CFETR) Design · China
• CTRFR-1 / Startorus No.1 (Startorus Fusion) Design · China
• EAST (Experimental Advanced Superconducting Tokamak) Operating · China
• EU DEMO (EUROfusion Demonstration Power Plant) Concept · European Union
• FAST (Fusion by Advanced Superconducting Tokamak) Design · Japan
• HH170 (Energy Singularity) Design · China

See all 51 projects in the Fusion Energy Companies & Projects Tracker →

Sources

1. News — Energy Singularity (primary), checked 2026-10-11
2. China's commercial 'artificial sun' achieves first discharge — Global Times, checked 2026-10-11