[TML] [Merchant Shipping] Some ideas I came up with tomakemerchant shipping more interesing

[shadow at shadowgard.com]

On 14 Apr 2008 at 22:32, Joseph Paul wrote:

>  >Or hitting it with a pulse of sufficiently high magnetic field.
> 
> Hmmm. How does that work? How strong a field is needed and does that vary by
> the current carried in the wire?

All known superconductors have a critical temp (temp above which the 
quit superconducting), critical current (current above which they 
quit superconducting) and a critical field density (magnetic field 
strength aboive which they quit superconducting).

So if you get a mag field pulse that exceeds the critical density, 
the affected bit of cable becomes a "normal" conductor. And that 
instantly starts runaway heating (as most superconductors are realy 
*lousy* coonductors when they aren't superconducting). 
--
Leonard Erickson (aka shadow)
shadow at shadowgard dot com