Hysteresis losses in superconductors of round cross-section with collective interaction

✍ Scribed by V.B. Zenkevitch; V.V. Zheltov; A.S. Romanyuk

• Publisher: Elsevier Science
• Year: 1978
• Tongue: English
• Weight: 644 KB
• Volume: 18
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(78)90117-0

✦ Synopsis

The paper presents the results of an experimental study of hysteresis losses in a transverse magnetic field by samples that represent small coils made of round wire of Nb-Ti alloy. The experimental results turned out to be considerably different from the values computed by the methods described in the fiterature. A theoretical analysis has been conducted of the effect of the demagnetization factors of the conductor and the field, associated with magnetization of other turns of the winding, and used as the basis for obtaining sufficiently general closed-form types of dependence which make it possible to compute the losses with a high degree of accuracy.

Hysteresis losses in

superconductors of round cross-section with collective interaction V.B. Zenkevitch, V.V. Zheltov, A.S. Romanyuk Nomenclature B e the flux density of.external magnetic field, AB e =Be max_ B mm B a the flux density of.applied magnetic field, max mm AB a = B a -B a Bb the average value of the external field ABp the change in the applied field necessary for the change in direction of the magnetization currents over the whole cross-section of the sample M the magnetic momentum per unit length, max mm-. AM--M(B a )-M(B a ) Q the losses in a unit of superconductor volume per cycle D the superconductor diameter d the plate thickness or the equivalent diameter of superconductor E the electric field r the characteristic time of the process the magnetic field drop near the superductor surface