Halcyon Aneutronic
Halcyon Aneutronic
Proton-boron-11 fusion at a $50 minimum. The most speculative thing on this platform, and we would rather say so.
Proton-boron-11 produces three helium nuclei and essentially no neutrons, which would mean no activated structure, no tritium handling and no neutron shielding. It is also the hardest fusion reaction anyone is seriously attempting, requiring roughly ten times the temperature of deuterium-tritium against much stronger radiative losses. Halcyon has demonstrated the ion beam and nothing beyond it.
$742,000 committed of $3,000,000
$111,300 released · 25% subscribed
- Minimum
- $50
- Instrument
- SAFE
- Term
- None
- Investors
- 1,684
$50 per unit
Closes January 31, 2027 · 140 days remaining
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TRL assessment
2
Technology readiness level, 1 to 9
Confidence band 1.4 – 2.9
An ion beam has been produced and characterized at the intended energy. That is a component result and the concept has been formulated in the literature, which is level 2 and nothing more. Proton-boron-11 requires roughly an order of magnitude higher temperature than deuterium-tritium while radiating energy away faster, and a substantial body of published analysis argues net energy may be unreachable by any known confinement method. The band is the widest the methodology produces.
At TRL 2, the ladder permits SAFE or Convertible note and releases up to 15% of committed capital. This offering is structured as a safe, which is consistent with that band.
Signed and published
- Reviewer
- Dr. Ingrid Halvorsen
- Credential
- PhD Plasma Physics; fusion program technical reviewer
- Signed
- July 1, 2026
- Published
- July 2, 2026
- Methodology
- v1.4
- Model
- ci-trl-2026.06
- Generated
- Jun 26, 2026
Evidence
Every score cites the documents it was derived from, with the weight each carried. An assessment without evidence is an opinion.
| Source | Document | Date | Weight |
|---|---|---|---|
| Peer-reviewed publication | Ion beam energy and current characterization Peer-reviewed applied physics literature Beam parameters measured; fusion yield below detection threshold as expected at this stage. | May 19, 2026 | 42% |
| Peer-reviewed publication | Aneutronic ignition feasibility analysis Peer-reviewed literature, including dissenting analyses Published analyses disagree on whether the required conditions are achievable. Both views are in the record. | Oct 8, 2025 | 33% |
| Patent | Target and beam injection configuration One granted patent, two pending Novelty established. TRL implication minimal. | Feb 11, 2026 | 25% |
Score history
A score changes on the day a reviewer signs a new assessment, which is why this is a step line rather than a curve.