> Is this due to resistive dissipation (heat)? No: > The two currents produce magnetic fields that repel each other. However, the main coil is a relatively th

> Is this due to resistive dissipation (heat)? No: > The two currents produce magnetic fields that repel each other. However, the main coil is a relatively thick and heavily reinforced ring of copper-lined steel, and the liner is practically foil. You can guess which wins this fight. “Because of the difference in the mass inertia, the liner implodes inwards” at a rate of about 5 kilometers per second, explains Takeyama. As it does so, it compresses the 3.2 T field so that when the liner is at its smallest, the magnetic field inside it reaches 1,200 Tesla. Unable to be compressed any further, the liner rebounds at about the same rate it imploded, destroying itself and the main coil.