From: ronkean@juno.com
Date: Thu Sep 02 1999 - 01:04:51 MDT
On Wed, 1 Sep 1999 19:56:58 -0700 (PDT) Eugene Leitl
<eugene.leitl@lrz.uni-muenchen.de> writes:
> ronkean@juno.com writes:
>> But suppose you found a superconductive material that could carry
>> a billion amps in a wire 1/4 inch thick. Then the magnetic forces
>> would tear the coil apart.
> It helps to make the coil large, very large. Like some ten miles in
> diameter.
>
I agree that the larger the area enclosed by the coil, the larger the
storage capacity relative to the current and number of turns. I think
the storage capacity of a superconductive coil is simply equal to the
energy of the magnetic field created by the coil, which would be
proportional to the product of the current, the area enclosed, and the
number of turns; at least for a Helmholtz-style coil.
Ron Kean
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