Current sharing and the stability of composite MgB2 superconductors

被引：15

作者：

Holubek, T. ^{[1
]}

Kovac, P. ^{[1
]}

Takacs, S. ^{[1
]}

Husek, I. ^{[1
]}

Melisek, T. ^{[1
]}

机构：

[1] Slovak Acad Sci, Inst Elect Engn, Ctr Excellence CENG, Bratislava 84104, Slovakia

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2008年 / 21卷 / 06期

关键词：

D O I：

10.1088/0953-2048/21/6/065013

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

I-V characteristics of various MgB2 superconductors were analysed. The transition between the superconducting and normal states of an MgB2 composite conductor is accompanied by a rapid current redistribution between MgB2 filaments and the metallic sheath. It was clarified why the nature of the transition is different at low and at high critical currents. The heat flux and current density in MgB2 and those in the metal sheath at the transition were determined. The transition of the filaments into a normal state is caused mainly by the heat generated in MgB2 at high critical currents. On the other side, at low critical currents, mainly the heat generated in the sheath material is responsible for the transition of a filament. Based on the current redistribution in the matrix, the consequent heat generation and the critical current versus magnetic field dependence, various composite MgB2 conductors were compared and discussed for their stability.

引用

页数：8

共 28 条

[1]

[Anonymous], 1992, NIST MONOGRAPH

[2] Critical current and cryogenic stability modelling of filamentary MgB2 conductors [J].

Glowacki, B. A. ;

Majoros, M. ;

Tanaka, K. ;

Kitaguchi, H. ;

Kumakura, H. ;

Okada, M. ;

Hirakawa, M. ;

Yamada, H. ;

Hancock, M. H. ;

Bay, N. .

7TH EUROPEAN CONFERENCE ON APPLIED SUPERCONDUCTIVITY (EUCAS'05), 2006, 43 :103-106

[3] Considerations on critical currents and stability of MgB2 wires made by different preparation routes [J].

Goldacker, W ;

Schlachter, SI ;

Liu, B ;

Obst, B ;

Klimenko, E .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2004, 401 (1-4) :80-86

[4]

Ho C. Y., 2009, J. Phys. Chem. Ref. Data, V1, P279, DOI DOI 10.1063/1.3253100

[5] Current transfer in MgB2 wires with different sheath materials [J].

Holubek, T. ;

Dhalle, M. ;

Kovac, P. .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2007, 20 (03) :123-128

[6] Current transfer length in MgB2/Fe mono-core wire and approximation of the interface layer resistivity [J].

Holúbek, T ;

Kovác, P ;

Melisek, T .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2005, 18 (09) :1218-1221

[7] Properties of doped ex and in situ MgB2 multi-filament superconductors [J].

Kovac, P. ;

Husek, I. ;

Melisek, T. ;

Martinez, E. ;

Dhalle, M. .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2006, 19 (10) :1076-1082

[8] MgB2 composite wires with Fe, Nb and Ta sheaths [J].

Kovac, P. ;

Husek, I. ;

Melisek, T. ;

Kulich, M. ;

Strbik, V. .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2006, 19 (06) :600-605

[9] Basic properties of rectangular MgB2/FeNiCo and MgB2/Fe wires made in situ [J].

Kovác, P ;

Husek, I ;

Melisek, T ;

Strbík, V .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2005, 18 (06) :856-860

[10] Improvement of the current carrying capability of ex situ MgB2 wires by normal particle additions [J].

Kovac, P ;

Husek, I ;

Melisek, T ;

Grovenor, CRM ;

Haigh, S ;

Jones, H .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2004, 17 (11) :1225-1230

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