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Antimagnets

Posted: Sun Aug 14, 2011 6:01 pm
by DeltaV

Posted: Fri Mar 23, 2012 4:42 am
by DeltaV

Posted: Mon Mar 26, 2012 2:28 am
by 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.

Posted: Mon Mar 26, 2012 4:05 am
by DeltaV
For Polywell, I see it possibly useful for test probes and/or support structures that don't affect the "ideal" B field.

Posted: Mon Mar 26, 2012 11:26 am
by 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!"

Posted: Mon Mar 26, 2012 4:37 pm
by 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?

Re: Antimagnets

Posted: Sat Jul 05, 2014 6:13 pm
by DeltaV

Re: Antimagnets

Posted: Wed Aug 26, 2015 2:01 am
by DeltaV
A Magnetic Wormhole
http://www.nature.com/articles/srep12488

Free PDF.

Image

Re: Antimagnets

Posted: Sun Dec 06, 2015 3:31 am
by DeltaV
Three-dimensional magnetic cloak working from d.c. to 250 kHz
http://www.nature.com/ncomms/2015/15112 ... s9931.html