Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!

 



Forgot your password?
typodupeerror
×

Comment Re:Planetary magnetic field generator (Score 1) 156

Turns out that a superconductor won't lose that field. The items moving around the field have work done on them. But that is directly via forces on those objects. It won't suck energy out of the coil. In other words its a really big almost perfect permanent magnet. Of course this is once its all started. During start up there will be extra energy required for such dissipation effects, and well iron in the core will change things quite a bit.

I did the calculation to show that it was a silly idea (need cables made out of magic sort of thing). But it turns out the numbers are not nearly as bad as i expected. Not easy either and probably not as practical as just making a dome. But meh.

Comment Re:Planetary magnetic field generator (Score 1) 156

It is not quite as easy as it sounds. If we assume we want a field strength close to what earths is, ie about 65 micro T, from the radius of mars of 3390km, we would need a current of 350MA. That is quite a bit. But even worse is the force this wire is under. The tension is 77.276 GN. The total energy in the magnetic field is 6.3MW/h.

Well it seems sort of plausible.

Slashdot Top Deals

Credit ... is the only enduring testimonial to man's confidence in man. -- James Blish

Working...