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Quench characteristics of HTS conductors at low temperatures

Quench characteristics of HTS conductors at low temperatures
Quench characteristics of HTS conductors at low temperatures
Not withstanding their high stability at liquid nitrogen
temperatures, quench propagation due local disturbances
remains a crucial issue for high temperature superconductors
(HTS) operating at low temperatures as high field insert coils and
cryogen-free magnets. In contrast to low temperature superconductors
(LTS), normal zone in HTS at low temperatures must
develop over a much extended temperature range for current
sharing with a highly non-linear dependence on temperature. The
present work addresses this issue directly using both computer
simulation and experimental studies. Several quench characteristics
unique to HTS have identified using a comparative study
of the underlying quasilinear parabolic equation represented in
an appropriate dimensionless form for proper isolation of the
known effects of temperature dependence of thermal properties.
Most notable and counter-intuitive finding is that the minimum
propagation zone (MPZ) was found to increase with transport
current. The correlations of minimum quench energy (MQE) and
the quench temperature of MPZ with operating temperature and
current have been obtained for comparison with experimental
results.
high temperature superconductors, quench protection, superconducting magnets
1051-8223
1317-1320
Huang, Taotao
05cd33eb-8799-4539-b2f7-2828d79118b3
Martínez, Elena
f68eae95-927b-4c42-895f-1e4098903b1d
Friend, Chris
89648b23-6c38-47d2-81ce-2a8fe14b1935
Yang, Yifeng
4cac858a-e0c0-4174-a839-05ca394fc51f
Huang, Taotao
05cd33eb-8799-4539-b2f7-2828d79118b3
Martínez, Elena
f68eae95-927b-4c42-895f-1e4098903b1d
Friend, Chris
89648b23-6c38-47d2-81ce-2a8fe14b1935
Yang, Yifeng
4cac858a-e0c0-4174-a839-05ca394fc51f

Huang, Taotao, Martínez, Elena, Friend, Chris and Yang, Yifeng (2008) Quench characteristics of HTS conductors at low temperatures. IEEE Transactions on Applied Superconductivity, 18 (2), 1317-1320.

Record type: Article

Abstract

Not withstanding their high stability at liquid nitrogen
temperatures, quench propagation due local disturbances
remains a crucial issue for high temperature superconductors
(HTS) operating at low temperatures as high field insert coils and
cryogen-free magnets. In contrast to low temperature superconductors
(LTS), normal zone in HTS at low temperatures must
develop over a much extended temperature range for current
sharing with a highly non-linear dependence on temperature. The
present work addresses this issue directly using both computer
simulation and experimental studies. Several quench characteristics
unique to HTS have identified using a comparative study
of the underlying quasilinear parabolic equation represented in
an appropriate dimensionless form for proper isolation of the
known effects of temperature dependence of thermal properties.
Most notable and counter-intuitive finding is that the minimum
propagation zone (MPZ) was found to increase with transport
current. The correlations of minimum quench energy (MQE) and
the quench temperature of MPZ with operating temperature and
current have been obtained for comparison with experimental
results.

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More information

Published date: June 2008
Keywords: high temperature superconductors, quench protection, superconducting magnets

Identifiers

Local EPrints ID: 155343
URI: http://eprints.soton.ac.uk/id/eprint/155343
ISSN: 1051-8223
PURE UUID: 8c3b1b35-482c-4942-b508-536046d263b5
ORCID for Yifeng Yang: ORCID iD orcid.org/0000-0002-3874-6735

Catalogue record

Date deposited: 27 May 2010 13:24
Last modified: 14 Mar 2024 02:37

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Contributors

Author: Taotao Huang
Author: Elena Martínez
Author: Chris Friend
Author: Yifeng Yang ORCID iD

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