This EETimes story talks about an iron based superconductor that remains superconducting at 55 deg Kelvin and in the presence of magnetic fields of greater than 45 telsa.
If this turns out to be real, then much smaller Polywells might well be possible.
High Temp superconductor with high quench limit
Re: High Temp superconductor with high quench limit
I'd like to see the Tc vs B field curves. Also Jc vs T curves.BitBanger wrote:This EETimes story talks about an iron based superconductor that remains superconducting at 55 deg Kelvin and in the presence of magnetic fields of greater than 45 telsa.
If this turns out to be real, then much smaller Polywells might well be possible.
What is encouraging is that MgB2 went from discovery in 2002 to product in 2006. Hopefully this can go down the learning curve as fast.
MgB2 has the advantage of ductility. These new ones being oxide based may have fabrication problems similar to CuO based materials. That would be a snag.
Engineering is the art of making what you want from what you can get at a profit.
Wow, this does sound quite promising:
It says a lot of chemical substitution should be possible. Hopefully some variation has the other properties that would make it suitable.
Now, U.S. researchers have confirmed those results, heralding a new generation of "supermagnets" for magnetic-resonance imaging (MRI) machines, superconducting electric motors, power-generators and -transmission lines
...
...which kept superconducting all the way up to 45 tesla. No other superconductors have been able to tolerate magnetic fields that high, making the new iron-based materials candidates for generating magnetic fields even stronger than those possible today.
It says a lot of chemical substitution should be possible. Hopefully some variation has the other properties that would make it suitable.
Re: High Temp superconductor with high quench limit
I'm not sure how ductile it is in service.MSimon wrote: MgB2 has the advantage of ductility. These new ones being oxide based may have fabrication problems similar to CuO based materials. That would be a snag.
Their process first forms the wire (with the powdered MgB2 inside) into the coil then they sinter it at high temperature.
That implies they can't sinter it before winding into a coil, or they would do it that way.
Fortunately we can live with that.
-Tom Boydston-
"If we knew what we were doing, it wouldn’t be called research, would it?" ~Albert Einstein
"If we knew what we were doing, it wouldn’t be called research, would it?" ~Albert Einstein