Helium‑3 ³He
The premier neutron‑detector gas, the enabling coolant of quantum computing, and the fuel of the Kronos burner fleet — bred independently of the tritium blanket, so it carries no breeding‑ratio contingency.
Five demand curves, one scarce gas.
Helium‑3 is uniquely irreplaceable across national security, computing, and medicine. Nothing substitutes for it in a dilution refrigerator or a treaty‑grade neutron detector.
Via ³He(n,p)³H, it is the premier neutron‑detector gas — radiation portal monitors at ports and borders, treaty verification, and nuclear forensics.
³He/⁴He dilution refrigerators are the only practical route to millikelvin temperatures. Every superconducting quantum computer and dark‑matter detector depends on them — demand scales directly with the quantum industry.
The fuel for Kronos's own burner fleet — Aegis and MetroVolt. HYPERION feeding the burners is the vertically integrated core of the program.
Hyperpolarized ³He MRI images lung ventilation directly — a functional view no other modality provides.
Neutron‑porosity tools for the field; superfluid‑³He physics and NMR standards in the lab.
A shortage that never resolved.
By‑product supply against structural demand
The federal ³He auction ended in 2009 and the shortage has never resolved. Supply is essentially a by‑product of tritium decay elsewhere — while quantum‑era demand rises against it. A dedicated domestic source changes the picture.
A dedicated domestic source.
Independent of the blanket
Helium‑3 is produced independently of the tritium‑breeding blanket, so its yield carries no breeding‑ratio contingency — the highest‑value product is the most robust one.
At the demonstrated point
The plasma physics that makes HYPERION possible is solved at demonstrated confinement — fusion gain Q 3.424 — not at a hoped‑for future operating point.