Stability analysis of NbTi-Ta-based high field conductor cooled by pool boiling below 4 K

Conference · Mon Sep 01 04:00:00 EDT 1980

OSTI ID:6894634

Chen, W. Y.; Alcorn, J. S.; Hsu, Y. H.; Purcell, J. R.

Stability analysis has been performed for cabled NbTi-Ta-based superconductors intended for the high field (12 T) toroidal field coils for a large scale tokamak device such as ETF. Ternary NbTi-Ta was selected as the superconductor because of its superior critical current density at high field as compared to the binary alloy NbTi. The operating temperature was chosen to be 2.5 K or below to optimize the performance of the superconductor. A cabled conductor was selected to minimize the pulsed field losses. The conductor is cooled by pool boiling in a subcooled (approx. 2.5 K, 0.25 atm) bath, or in a superfluid helium (He-II) bath (approx. 1.8 K, 0.02 atm). The analysis was based on numerically simulating the evolution of a normal zone in the conductor. Appropriate superconductor properties and heat transfer characteristics were utilized in the simulation.

• Research Organization: General Atomic Co., San Diego, CA (USA)
• DOE Contract Number: AT03-76ET51011
• OSTI ID: 6894634
• Report Number(s): GA-A-16013; CONF-800980-15
• Country of Publication: United States
• Language: English

Related Subjects

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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
BOILING
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
MAGNETS
NIOBIUM ALLOYS
PHASE TRANSFORMATIONS
POOL BOILING
STABILITY
SUPERCONDUCTING DEVICES
SUPERCONDUCTING MAGNETS
TANTALUM ALLOYS
THERMONUCLEAR REACTORS
TITANIUM ALLOYS
TOKAMAK ETF
TOKAMAK TYPE REACTORS