From: utzoo!decvax!genradbo!linus!lemmon
Newsgroups: net.physics
Title: Re: long superconductors
Article-I.D.: linus.2209
Posted: Thu Jan  6 10:30:06 1983
Received: Fri Jan  7 02:18:08 1983
References: sri-unix.4923

I think that the heat flux is very relevant.  If the cable can only
carry a certain heat flux (even with zero temperature drop), then
it can only cool a length of itself limited by the heat leakage
per unit length.  Beyond that length, the flux at the refrigerator
would exceed the carrying capacity of the cable, which would then
(probably) cease being superconducting.  Rather odd cyclic behavior
might occur.  In any case, there would be a need for refrigerators
every so often.

Alan Lemmon