Semi-Retractable Current Lead Cooled by a Cryocooler for High Field Magnet

The semi-retractable current lead cooled by a cryocooler is designed for a high field superconducting magnet system. The semi-retractable current lead is composed of a normal metal element, conducting the current from room temperature to an intermediate temperature, and an HTS element, conducting th...

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Published inIEEE transactions on applied superconductivity Vol. 19; no. 3; pp. 2210 - 2213
Main Authors Choi, Y.S., Painter, T.A., Kim, D.L., Yang, H.S., Lee, B.S.
Format Journal Article Conference Proceeding
LanguageEnglish
Published New York, NY IEEE 01.06.2009
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
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Abstract The semi-retractable current lead cooled by a cryocooler is designed for a high field superconducting magnet system. The semi-retractable current lead is composed of a normal metal element, conducting the current from room temperature to an intermediate temperature, and an HTS element, conducting the current down to liquid helium temperature. An HTS element and the joint between the normal metal and HTS element are connected to a two-stage cryocooler. The intermediate joint carries current through a strip of louvered material. After charging the normal metal element is disengaged from the HTS element without breaking vacuum in the insulating space. The semi-retractable current lead is fabricated and assembled with a two-stage cryocooler for feasibility test. The adaptability and reliability of the lead are tested during engage and disengage performance. The electrical contact resistance is also measured in the intermediate joint with respect to the vacuum level and temperature has been measured.
AbstractList The semi-retractable current lead cooled by a cryocooler is designed for a high field superconducting magnet system. The semi-retractable current lead is composed of a normal metal element, conducting the current from room temperature to an intermediate temperature, and an HTS element, conducting the current down to liquid helium temperature. An HTS element and the joint between the normal metal and HTS element are connected to a two-stage cryocooler. The intermediate joint carries current through a strip of louvered material. After charging the normal metal element is disengaged from the HTS element without breaking vacuum in the insulating space. The semi-retractable current lead is fabricated and assembled with a two-stage cryocooler for feasibility test. The adaptability and reliability of the lead are tested during engage and disengage performance. The electrical contact resistance is also measured in the intermediate joint with respect to the vacuum level and temperature has been measured.
The semi-retractable current lead is composed of a normal metal element, conducting the current from room temperature to an intermediate temperature, and an HTS element, conducting the current down to liquid helium temperature.
The semi-retractable current lead cooled by a cryocooler is designed for a high field superconducting magnet system. The semi-retractable current lead is composed of a normal metal element, conducting the current from room temperature to an [abstract truncated by publisher].
Author Kim, D.L.
Painter, T.A.
Choi, Y.S.
Lee, B.S.
Yang, H.S.
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10.1109/TASC.2005.869627
10.1109/PPC.1999.823603
10.1007/978-1-4613-0373-2_73
10.1109/TASC.2007.898179
10.1063/1.1148810
10.1063/1.1774775
10.1109/77.614595
10.1016/S0011-2275(98)00043-5
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Issue 3
Keywords Performance evaluation
Thermal management (packaging)
Adaptability
Optimization method
current leads
Contact resistance
Conduction cooling
Optimization
High field
Electrical conductor
Resistor
Multistage circuit
High temperature superconductor
Multistage method
Cooling
Magnet
Electric contact
Superconducting magnet
Cooling system
Electric resistivity
Feasibility
Reliability
Strip material
Room temperature
superconducting magnets
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Snippet The semi-retractable current lead cooled by a cryocooler is designed for a high field superconducting magnet system. The semi-retractable current lead is...
The semi-retractable current lead is composed of a normal metal element, conducting the current from room temperature to an intermediate temperature, and an...
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SubjectTerms Applied sciences
Charging
Conducting materials
Conduction
Conduction cooling
Contact resistance
current leads
Disengaging
Electric connection. Cables. Wiring
Electric variables measurement
Electrical engineering. Electrical power engineering
Electrical resistance measurement
Electromagnets
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Exact sciences and technology
Feasibility
Helium
High field magnets
High temperature superconductors
Interfaces
Lead
Liquid helium
optimization
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Strips
Superconducting magnets
Superconductivity
Temperature measurement
Testing
Various equipment and components
Title Semi-Retractable Current Lead Cooled by a Cryocooler for High Field Magnet
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Volume 19
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