Vapor locking as a limitation to the stability of composite conductors cooled by boiling helium
Abstract
Vapor locking was observed to limit the stability of superconductors in narrow channels. The limitation is consistent with an analysis based on reduction of cooled surface by vapor formation. In very long channels however, it was found that stability increases. When the superconductor inside long sheathed sections recovers from the resistive state, it recovers faster than in the open section. This is believed due to increase of the heat transfer coefficient and heat capacity caused by pressure build up and relief inside the sleeve.
- Publication:
-
Presented at the Cryog. Eng. Conf
- Pub Date:
- 1977
- Bibcode:
- 1977cren.conf.....L
- Keywords:
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- Liquid Helium;
- Stability;
- Superconductors;
- Vapor Deposition;
- Channels;
- Heat Transfer;
- Specific Heat;
- Surface Cooling;
- Fluid Mechanics and Heat Transfer