THEORETICAL AND EXPERIMENTAL ASPECTS OF SUPERCONDUCTING COIL PROTECTION
- Resource Type
- Technical Report
- Authors
- Source
- Other Information: Orig. Receipt Date: 31-DEC-63
- Subject
- PHYSICS BREAKDOWN
COILS
CONFIGURATION
COPPER
CURRENTS
DECAY
ELECTRIC POTENTIAL
ENERGY
HEATING
LOSSES
MEASURED VALUES
NIOBIUM
STORAGE
SUPERCONDUCTIVITY
TRANSIENTS
VARIATIONS
VELOCITY
WIRES
ZIRCONIUM
- Language
- English
Large superconducting coils require protection against overheating or voltage breakdown during a transition to the normal state. The basic theory of a number of protection techniques is summarized. Experimental measurements of the allowable energy dissipation in Nb-- Zr wire, the decay times of Nb-- Zr coils, and the shapes of current decay curves, support the main conclusions of the theory. Random variations in the observed decay curves appear to indicate an initial variable acceleration of the transition velocity. The maximum fraction of the stored energy that can be dissipated outside the cryostat is estimated theoretically. Some brief comments on protection using copper coated wire are included. (auth)