Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University >

2017 , Vol. 51 >Issue 9: 1090 - 1096

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2017.09.011

 Quench Propagation Characteristics Influenced by NonUniform Properties of
YBa2Cu3O7δ  High Temperature Superconducting Tape

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  •  1. Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
    2. Shanghai Superconductor Technology Co., Ltd., Shanghai 200240, China

Online published: 2017-09-20

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Abstract

The quench propagation characteristics affected by nonuniform properties are investigated by three different types of YBa2Cu3O7δ (YBCO) high temperature superconducting tape which are point defect sample with Cu stabilizers, regional defect sample without Cu stabilizers, and regional defect sample with Cu stabilizers. Voltage probes are attached to the samples to measure the normal zone propagation velocity in liquid nitrogen (77K). The applied current is gradually increased to explore the relationship between the quench characteristics and the degraded critical current. The quench characteristics between point and regional defects are compared. Moreover, comparing the experiments with the numerical results, the influence of the stabilizers is also discussed. The experimental results show that there is no quench under degraded critical current (Id). When the transport current is higher than Id but lower than critical current  (Ic), quench propagations are different between point defect with Cu stabilizers. The point defect sample quenches only in the defect region.

Key words：  YBa2Cu3O7δ (YBCO); superconducting tape; high temperature superconducting; nonuniform properties; quench propagations; propagation velocity

Cite this article

?YANG Ping1,SHENG Jie1,WANG Yucheng2,LI Zhuyong1,JIN Zhijian1,HONG Zhiyong1 .  Quench Propagation Characteristics Influenced by NonUniform Properties of
YBa2Cu3O7δ  High Temperature Superconducting Tape
[J]. Journal of Shanghai Jiaotong University, 2017 , 51(9) : 1090 -1096 . DOI: 10.16183/j.cnki.jsjtu.2017.09.011

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