Note on the cryostatic stability of superconducting composites
Abstract
The equal area condition developed by Maddock et al is discussed. In order to make the essential points as clear as possible, analytical solutions are derived under simplifying assumptions (simple model for heat transfer by nucleate and film boiling liquid helium; constant heat conduction and specific heat) instead of using more realistic but less controllable computer calculations. A quantitative definition of the concept of a long wire is given. Numerical examples for the Maddock transition characterized by the equal area condition are given for a long superconducting composite with linear cooling and for a liquid heliumcooled resistance wire of finite length. In addition, cases are shown where instead of applying the equal area stability condition, timedependent solutions should be considered.
 Publication:

Unknown
 Pub Date:
 February 1978
 Bibcode:
 1978ncss.rept.....G
 Keywords:

 Composite Materials;
 Cryogenic Magnets;
 Electric Wire;
 Low Temperature Physics;
 Static Stability;
 Superconductors;
 Film Boiling;
 Heat Transfer;
 Liquid Helium;
 Magnet Coils;
 Nucleate Boiling;
 Superconducting Magnets;
 SolidState Physics