Persistent-current superconducting magnets. The Penning trap solenoid operates in persistent-current mode — once charged, the superconducting current circulates indefinitely without external power as long as the magnet remains below its critical temperature. If all external power is lost, the magnetic field persists. The onboard Phase Flash cryogenic system provides a grace period of 72 hours on stored cooling capacity before the magnet warms above critical temperature.

Superfluid helium thermal reservoir. The trap is immersed in a bath of superfluid helium-4 (below 2.17 K). If the active cryocooler fails, the latent heat of the helium bath absorbs the thermal leak from the environment, extending the cryogenic grace period beyond the 72 hours provided by the cryocooler alone. The helium bath is the thermal equivalent of a UPS battery — it buys time for human intervention or controlled shutdown.

Controlled annihilation dump. If containment breach is assessed as inevitable — magnet warming past the point of recovery, cryogenic reserves exhausted, no repair pathway available — the final safety layer is controlled release of the antimatter into a shielded dump mass. The dump is a block of depleted uranium surrounded by borated polyethylene, designed to absorb the annihilation energy and convert it to heat within a contained volume. At microgram inventory, the dump absorbs the energy without structural failure. At milligram-to-gram inventory (Tartarus-class facilities only), the dump is sized to direct the energy release vertically through an engineered chimney — see Facility 02.