How to generate strong variable-freq. AC magnetic field?

[Fungus]

About the secrecy: It's a very interesting application that I wish to remain secret for the time being, but later I will vlog about it and you guys will be the first to know.

I knew it.  It's another phone charger.

[OldN00b]

@fcb:

Superconductors is not an option. Litz wire would be an option for a commercial embodiment, fine copper/silver tubing with water cooling will be the experimental prototype's embodiment due to cooling requirements. Due to the low required duty cycle, I may even be able to get away with Litz. It needs experimentation. A commercial embodiment can be fixed-frequency so many issues disappear.

My experimental prototype is already the absolute smallest I can make it, due to an absolute requirement of 1 CM3 minimal volume. I can go to 20 KV though, to have a small value cap and a Helmholtz coil with just a couple windings and still achieve a high resonance freq. A commercial embodiment would better use a lower voltage.

[T3sl4co1l]

Due to the low required duty cycle,

You never said it was pulsed.  You implied it was CW.

Tim

[OldN00b]

I said that It's OK to have a 0.01% duty cycle.