The first thing I thought of when I saw your coins was..if you can shrink metal.. can a magnetic field be used to compress a berylium reflector sphere with a plutonium core? ie a nuclear bomb. Traditonal explosive lenses are used to initiate the core now. Can a magnetic field generate the forces comprable to an exlposive lens? I know it can contain nuclear fusion ie tokomak . How many Kv would be required and could a field be reliably modulated to produce a uniform comression wave on a shperical structure. Thinking outside of the box.