Low resistance splices for HTS devices and applications
- Brookhaven National Laboratory (BNL), Upton, NY (United States). Superconducting Magnet Division; Michigan State Univ., East Lansing, MI (United States). Magnet Systems Dept. and Facility for Rare Isoptope Beams Lab.
This paper discusses the preparation methodology and performance evaluation of low resistance splices made of the second generation (2G) high-temperature superconductor (HTS). These splices are required in a broad spectrum of HTS devices including a large aperture, high-field solenoid built in the laboratory to demonstrate a superconducting magnetic energy storage (SMES) device. Several pancake coils are assembled in the form of a nested solenoid, and each coil requires a hundred meters or more of 2G (RE)BCO tape. However, commercial availability of this superconductor with a very uniform physical properties is currently limited to shorter piece lengths. This necessitates us having splices to inter-connect the tape pieces within a pancake coil, between adjacent pancake coils, and to attach HTS current leads to the magnet assembly. As a part of the optimization and qualification of splicing process, a systematic study was undertaken to analyze the electrical performance of splices in two different configurations suitable for this magnet assembly: lap joint and spiral joint. The electrical performance is quantified in terms of the resistance of splices estimated from the current-voltage characteristics. Finally, It has been demonstrated that a careful application of this splicing technique can generate lap joints with resistance less than 1 nΩ at 77 K.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Grant/Contract Number:
- SC0012704; AC02-98CH10886
- OSTI ID:
- 1440886
- Alternate ID(s):
- OSTI ID: 1550401
- Report Number(s):
- BNL-114434-2017-JAAM
- Journal Information:
- Cryogenics, Vol. 86, Issue C; ISSN 0011-2275
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
The Mechanical Design Optimization of a High Field HTS Solenoid
|
journal | June 2015 |
Test Results of High Performance HTS Pancake Coils at 77 K
|
journal | June 2014 |
Evaluation of Electrical Properties of Lap Joints for BSCCO and YBCO Tapes
|
journal | June 2009 |
Low Temperature and Magnetic Field Performance of Spliced Commercial YBCO CC
|
journal | June 2012 |
Splice Resistance Measurements on 2G YBCO Coated Conductors
|
journal | June 2009 |
Effect of thermal stress on crack growth in inhomogeneous cylindrical superconductor
|
journal | September 2018 |
Flux Pinning-Induced Stress in a Long Hollow Cylindrical Superconductor Restricted by a Metal Tube
|
journal | February 2018 |
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