Magnetic instability of superconducting wire in the changing magnetic field

Journal Article · Thu Jun 01 04:00:00 EDT 1978 · Electr. Eng. Jpn. (Engl. Transl.); (United States)

DOI:https://doi.org/10.1002/eej.4390980303· OSTI ID:5305504

Ohara, T ^[1]; Kaiho, K; Koyama, K; Komura, K; Namba, T

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1. Electrotechnical Lab., Tokyo, Japan

Existing theories are not suited for explaining the stability of superconductors in a rapidly fluctuating magnetic field. Therefore, an attempt was made to study the stability of superconductors in such a magnetic field. Special attention is given to magnetic diffusion in the flux creep condition and dependence of the flux jumping on the fluctuation of magnetic field is explained. It has been proposed in the past that the maximum magnetic field first flux jump which a superconductor can shield without flux jumping is proportional to 1/3 to 1/2 power of the speed of magnetic field increase. The relation between the rate of field increase and the flux jump formation field was determined. Using a single strand Nb-48% Ti wire, the effect of copper ratio, the presence or absence of insulating varnish, copper foil, and the magnetic field sweep rate on the initiation of flux jumps was studied.

• OSTI ID: 5305504
• Journal Information: Electr. Eng. Jpn. (Engl. Transl.); (United States), Journal Name: Electr. Eng. Jpn. (Engl. Transl.); (United States) Vol. 98:3; ISSN EENJA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COPPER
DATA
DATA FORMS
ELEMENTS
EXPERIMENTAL DATA
GRAPHS
INFORMATION
MAGNETIC FIELDS
MAGNETIC FLUX
METALS
NIOBIUM
NUMERICAL DATA
QUANTITY RATIO
REFRACTORY METALS
SPECIFICATIONS
STABILITY
SUPERCONDUCTING WIRES
SUPERCONDUCTORS
TABLES
TITANIUM
TRANSITION ELEMENTS
WIRES