How the Subsystems Fit Together

Hyperion is an integrated system: magnets, plasma, blanket, divertor, and heating all constrain one another around a compact center stack.

One machine, many couplings

Hyperion is not a collection of independent parts; every subsystem constrains the others. The magnets set the field that confines the plasma; the plasma current shapes the field in turn; the blanket needs coverage that heating ports interrupt; the divertor competes with breeding for the same limited volume. Understanding the machine means understanding these couplings, not just the components.

The center stack as the hub

Most of the hardest trades meet at the center stack. It carries the toroidal-field return and solenoid, reacts the coil forces, and sits closest to the plasma with the least shielding. Its diameter influences the field, the shielding budget, the breeding coverage on the inboard side, and the center-post lifetime. A change to one of these ripples through the others, which is why the center stack paces the whole design.

Access versus breeding

A second system-wide tension is access. Neutral beams, RF launchers, pumping, fueling, and diagnostics all need ports through the vessel and blanket, and every port is a neutron leak that lowers the net tritium breeding ratio. The layout is an optimization: enough access to run and diagnose the plasma, enough coverage to breed tritium, all within a compact envelope. Resolving these couplings self-consistently is the work of the integrated design-and-simulation program.

• Subsystems mutually constrain field, breeding, and exhaust
• The center stack is where the hardest trades converge
• Heating and diagnostic access competes with breeding coverage

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.