Stored Magnetic Energy
The coils hold large electromagnetic energy that is removed on a fault by a controlled dump rather than an uncontrolled release.
A high-field magnet is an energy store: the magnetic field represents real energy that must go somewhere if the coil faults. Managing this energy safely — removing it in a controlled way rather than letting it convert to heat in the wrong place — is a central magnet-safety function in any large superconducting system.
Handling the energy
- Controlled discharge: ramp current down through the power supply in normal shutdown.
- Fast dump: on a fault, switch the stored energy into external dump resistors.
- Structural containment: coil cases carry the large magnetic forces without failure.
- Interlocked sequencing: energization and de-energization follow protected sequences.
The breeder (Hyperion) reaches 16.84 T peak field; the burner (Aegis / MetroVolt) reaches 26.49 T at the plugs. Higher field means more stored energy per unit volume, so the burner's magnet-protection design carries this hazard with particular attention. In all cases the energy is electromagnetic and mechanical — there is no radiological component.
Mechanical forces
The same fields produce large forces between and within coils. These are reacted by robust structural cases and support structures designed to the full fault loads, so a quench or fast dump does not translate into structural failure. See quench protection and high-field zones.
Stored magnetic energy is a bounded, well-understood engineering hazard with a clear, tested disposal path.