Designing for low temperature stability of the large coil program Nb3Sn coil
Abstract
A design method has been developed which accounts for the effects of nonuniform void fraction on cooling of the cable-in-a-conduit (CIC) superconductor. The CIC superconductor concept is intended for application in high-field toroidal-field coils. The available literature on heat transfer and friction factor has been reviewed and a heat transfer computation method developed based on the availability of friction factor experimental data and the applicability of constant pressure thermodynamic processes. A design method has also been developed for joints and helium access regions based on minimum propagating zone criterion. Quench characteristics with and without an external dump resistor are described. Comparisons to existing work demonstrate that the magnet is free from hydraulic oscillations and instabilities.
- Publication:
-
8th Symposium on Engineering Problems of Fusion Research
- Pub Date:
- 1979
- Bibcode:
- 1979epfr.conf.1729E
- Keywords:
-
- Design Analysis;
- Low Temperature Environments;
- Magnet Coils;
- Superconductors;
- Thermal Stability;
- Cables (Ropes);
- Conducting Fluids;
- Friction Factor;
- Heat Transfer;
- Magnetic Field Configurations;
- Engineering (General)