Helion Energy became the first private company to achieve D-T nuclear fusion and is already developing a power plant for Microsoft

Helion Energy — the first private reactor demonstrating measurable thermonuclear fusion on D‑T

Indicator Details Project Polaris (7th cycle) Date of achievement start 2026 after obtaining tritium approval Temperature of plasma 150 million °C (≈13 keV) – ion temperature, electron lower Comparison Earlier Helion record: 100 million °C (Trenta, July 2025) Key moment Breaking the threshold at 150 million °C required for commercial reactors

How it was achieved
1. Impulse FRC approach

- Two plasma packets are accelerated toward each other and merge.

- Magnetic fields then “compress” the mixture, creating short but powerful thermonuclear conditions.

2. Test fuel – D‑T

- Used to verify high temperatures and neutron output.

- In the future a transition to D‑He³ (almost neutron‑free) is planned for radiation safety.

3. Plasma design

- The device resembles a dumbbell, distinguishing it from other projects.

- Electron plasma in Helion is cooler than ion plasma, thanks to magnetic field characteristics.

4. Energy extraction

- Plasma current “resists” the external field, inducing current in external coils (analogous to wireless charging).

- This allows direct electricity extraction without complex conversions.

Confirmation and recognition
- Diagnostic data confirmed by independent experts, including representatives of the U.S. Department of Energy (DOE).

- In January 2026 Polaris became the first private installation using D‑T fuel.

Future plans
Project Status Goal Construction site Microsoft (Washington state) Already started supplying electricity “later this decade” (~2028)

Conclusion
Helion Energy has proven that the private sector can not only approach thermonuclear energy but also surpass its own previous records. Achieving 150 million °C opens the path to commercial reactors, and the unique design promises simplified energy extraction and a rapid transition to industrial operation.