Antimagnets

[DeltaV]

Antimagnets: Controlling magnetic fields with superconductor-metamaterial hybrids

[DeltaV]

Update. They tested it and it works.

Magnetic cloak: Physicists create device invisible to magnetic fields

[rjaypeters]

Fascinating.

For Polywell applications, would this be a method of avoiding the cusps created by the close approach of the rings?* In effect, make each ring-generated magnetic field ignore the presence of the others? Confinement advantages? Structural advantages?

Maybe not, we want current carrying superconductors to create magnetic fields outside the ring casings. Would the ferromagnetic part of the shield attract the magnetic field generated by the internal superconductors?

*I forget which name is applied to those cusps.

[DeltaV]

For Polywell, I see it possibly useful for test probes and/or support structures that don't affect the "ideal" B field.

[rjaypeters]

Support structures: "Revenge of the Nubs!" or less aggressive: "Return of the Nubs!"

EDIT:

And how could I have missed these?

"Revenge of the Nurbs!" or "Return of the Nurbs!"

[KitemanSA]

I hope not. This would make the nubs even more of a problem than they are now. It is the minor amount of magnetic field that protects them a bit now (kind of like the middle picture). Making the nub invisible magnetically makes it maximally attractive electrostatically, no?

[DeltaV]

http://www.rowland.harvard.edu/sato/Publications.html

DC magnetic cloak

[DeltaV]

A Magnetic Wormhole
http://www.nature.com/articles/srep12488

Free PDF.

[DeltaV]

Three-dimensional magnetic cloak working from d.c. to 250 kHz
http://www.nature.com/ncomms/2015/15112 ... s9931.html