Development and characteristics of persistent mode in HTS magnet

Jung Ho Kim; Jun Hyung Lim; Jinho Joo; Seyong Choi; Se Hee Lee; Wansoo Nah; Hyoungku Kang; Tae Kuk Ko

doi:10.1016/j.physc.2004.01.124

Development and characteristics of persistent mode in HTS magnet

Jung Ho Kim, Jun Hyung Lim, Jinho Joo, Seyong Choi, Se Hee Lee, Wansoo Nah, Hyoungku Kang, Tae Kuk Ko

Department of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

We fabricated a high-temperature superconducting (HTS) magnet with a persistent current switch (PCS) and evaluated the decay characteristics of persistent mode and joint resistance at 77 K. To make the HTS magnet, BSCCO(2223) tapes were wound into a double-pancake coil and connected to the PCS by soldering. Field decay behavior was remarkably dependent on operating current. At an operating current of 50% of the critical current (I_c), decay behavior showed two distinct regimes: initial fast decay and subsequent linear decay. By contrast, there was a linear decay regime of only 13% of I _c. Total circuit resistance was approximately 2.0×10 ^-8 Ω at an operating current of 6 A. Measured decay behavior was closely consistent with the calculated decay behavior obtained from both the index resistance and joint resistance components.

Original language	English
Pages (from-to)	1026-1029
Number of pages	4
Journal	Physica C: Superconductivity and its Applications
Volume	412-414
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physc.2004.01.124
State	Published - Oct 2004

Keywords

HTS magnet
Persistent current switch
Persistent mode

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10.1016/j.physc.2004.01.124

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title = "Development and characteristics of persistent mode in HTS magnet",

abstract = "We fabricated a high-temperature superconducting (HTS) magnet with a persistent current switch (PCS) and evaluated the decay characteristics of persistent mode and joint resistance at 77 K. To make the HTS magnet, BSCCO(2223) tapes were wound into a double-pancake coil and connected to the PCS by soldering. Field decay behavior was remarkably dependent on operating current. At an operating current of 50\% of the critical current (Ic), decay behavior showed two distinct regimes: initial fast decay and subsequent linear decay. By contrast, there was a linear decay regime of only 13\% of I c. Total circuit resistance was approximately 2.0×10 -8 Ω at an operating current of 6 A. Measured decay behavior was closely consistent with the calculated decay behavior obtained from both the index resistance and joint resistance components.",

keywords = "HTS magnet, Persistent current switch, Persistent mode",

author = "Kim, \{Jung Ho\} and Lim, \{Jun Hyung\} and Jinho Joo and Seyong Choi and Lee, \{Se Hee\} and Wansoo Nah and Hyoungku Kang and Ko, \{Tae Kuk\}",

year = "2004",

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doi = "10.1016/j.physc.2004.01.124",

language = "English",

volume = "412-414",

pages = "1026--1029",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier B.V.",

number = "SPEC. ISS.",

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TY - JOUR

T1 - Development and characteristics of persistent mode in HTS magnet

AU - Kim, Jung Ho

AU - Lim, Jun Hyung

AU - Joo, Jinho

AU - Choi, Seyong

AU - Lee, Se Hee

AU - Nah, Wansoo

AU - Kang, Hyoungku

AU - Ko, Tae Kuk

PY - 2004/10

Y1 - 2004/10

N2 - We fabricated a high-temperature superconducting (HTS) magnet with a persistent current switch (PCS) and evaluated the decay characteristics of persistent mode and joint resistance at 77 K. To make the HTS magnet, BSCCO(2223) tapes were wound into a double-pancake coil and connected to the PCS by soldering. Field decay behavior was remarkably dependent on operating current. At an operating current of 50% of the critical current (Ic), decay behavior showed two distinct regimes: initial fast decay and subsequent linear decay. By contrast, there was a linear decay regime of only 13% of I c. Total circuit resistance was approximately 2.0×10 -8 Ω at an operating current of 6 A. Measured decay behavior was closely consistent with the calculated decay behavior obtained from both the index resistance and joint resistance components.

AB - We fabricated a high-temperature superconducting (HTS) magnet with a persistent current switch (PCS) and evaluated the decay characteristics of persistent mode and joint resistance at 77 K. To make the HTS magnet, BSCCO(2223) tapes were wound into a double-pancake coil and connected to the PCS by soldering. Field decay behavior was remarkably dependent on operating current. At an operating current of 50% of the critical current (Ic), decay behavior showed two distinct regimes: initial fast decay and subsequent linear decay. By contrast, there was a linear decay regime of only 13% of I c. Total circuit resistance was approximately 2.0×10 -8 Ω at an operating current of 6 A. Measured decay behavior was closely consistent with the calculated decay behavior obtained from both the index resistance and joint resistance components.

KW - HTS magnet

KW - Persistent current switch

KW - Persistent mode

UR - https://www.scopus.com/pages/publications/4644287778

U2 - 10.1016/j.physc.2004.01.124

DO - 10.1016/j.physc.2004.01.124

M3 - Article

AN - SCOPUS:4644287778

SN - 0921-4534

VL - 412-414

SP - 1026

EP - 1029

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - SPEC. ISS.

ER -

Development and characteristics of persistent mode in HTS magnet

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Keywords

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