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Computation of screening currents in superconducting persistent current devices

โœ Scribed by W. Witzeling

Publisher
Elsevier Science
Year
1976
Tongue
English
Weight
300 KB
Volume
16
Category
Article
ISSN
0011-2275

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โœฆ Synopsis

The penetration of screening currents induced in a hollow superconducting cylinder exposed to a transverse magnetic field is calculated two-dimensionally using a numerical model which simulates the superconductor by a system of parallel wire~ Assuming the critical state model and taking account of the dependence of critical current density on magnetic field, the penetration depth and local current density is computed.

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Large superconducting apparatus are best cooled by directly coupled refrigerators. The input of high currents to the superconductors produces heat losses according to the Wiedemann-Franz law. It is well-known that the direct input losses can be reduced when the leads are precooled over their entire