The Operating Point and Its Margins

The Hyperion operating point is a single self-consistent set of parameters; its credibility rests on the margins it holds against each limit.

One consistent state

The frozen numbers — Q_sci 3.076, 85.0 MW, 9.66 MA, 8 T on-axis (16.84 T peak), A 2.5, R0 1.2 m, delta -0.30 — are not independent choices. They form a single self-consistent operating point: the confinement, pressure, current, and shape must all be compatible with each other and with the stability limits simultaneously. Change one meaningfully and the others must move to stay consistent.

What makes an operating point credible is not just that it satisfies the equations but that it holds margin against the limits it approaches: margin below the beta limit, above the density limit's danger zone, within the disruption-safe current range, and inside the vertical-control capability. A point that only works with zero margin is not a design; it is a coincidence.

Where the margins are thin

Honestly, several margins depend on assumptions still being tested: the confinement level from an under-sampled parameter regime, the bootstrap fraction, the achievable Z_eff, and the net breeding. The operating point is defined in the design-and-simulation model, and its robustness is exactly what the gate program is built to check before and after the FOAK build. The point is stated with its dependencies, not as a finished guarantee.

• The frozen parameters are one self-consistent set, not independent
• Credibility = margin against beta, density, disruption, and control limits
• Key margins rest on assumptions the gates are meant to test

This page describes a design-and-simulation study, not a built machine. Construction begins Q2 2027; first-of-a-kind first tritium is targeted near 2030. No hardware net-gain is claimed before FOAK.