Conveners
Wed-Af-Po.04 - HTS Joints
- Jennifer Doyle (Lawrence Berkeley National Laboratory)
- Franco Julio Mangiarotti (CERN)
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Yuwei Zhou (Shanghai Jiaotong University)7/2/25, 2:30 PMPoster
The persistent current switch (PCS) is a key component for enabling persistent current mode operation in superconducting magnets. Based on our previous research, this study proposes a heater-triggered semi-PCS with an ultrahigh switching-off resistance, fabricated using laser cutting and suitable for REBCO tapes. After chemically etching tapes, a designated path was cut into the exposed...
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Mr Minkyu Sun (Korea University)7/2/25, 2:30 PMPoster
The solder layer in electronic systems has been the subject of a vast number of studies in the field of reliability assessment due to the weakness of this layer and the large difference between its mechanical characteristics and those of the rest of the system. Among these characteristics, the difference in the coefficient of thermal expansion drives the generation of thermal stress, which can...
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Gaël Berthet (Seoul national university)7/2/25, 2:30 PMPoster
Rare-Earth Barium Copper Oxide (REBCO)-based High-Temperature Superconductor (HTS) tapes are used for large-scale applications, which typically require spools longer than those currently produced. Therefore, several joints are often needed for a single project, emphasizing the importance of low-resistivity, mechanically strong, and repeatable joints. Currently, soldering is one of the most...
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Kenta Yajima (Meiji Univ.)7/2/25, 2:30 PMPoster
To achieve a controllable operating temperature for superconducting magnet devices, the development of cryocooler-cooled superconducting magnets has garnered significant attention. Typically, the excitation current of commercially available cryocooler-cooled superconducting magnets ranges from approximately 100 to 200 A. However, increasing the excitation current of superconducting magnets is...
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Uijong Bong (Hinetics, Inc.)7/2/25, 2:30 PMPoster
The concept of a rotating cryocooler for superconducting rotating machines eliminates the need for cryogenic liquids in the cooling loop, thereby simplifying and compacting the cooling system. This approach enables the development of extremely lightweight machines with high torque density. However, at high rotational speeds (e.g., >3000 rpm), operational conditions often limit the...
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Chris Kovacs (Scintillating Solutions LLC)7/2/25, 2:30 PMPoster
In the United States, a NASA University Leadership Initiative program with The Center for Cryogenic High-Efficiency Electrical Technologies for Aircraft (CHEETA) and a separate ARPA E Connecting Aviation By Lighter Electrical Systems (CABLES) program have been developing 2 kA-rated, medium voltage, and lightweight quick connectors for aerospace. These quick connectors will also permit a...
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Hyunsoo Park (Seoul National University)7/2/25, 2:30 PMPoster
The fabrication of high-temperature superconductor (HTS) magnets often involves manual soldering joints, which relies on operator skill and causes performance variations. To address these challenges, this study presents the design, fabrication, and experimental evaluation of a roller-shaped HTS coil joint apparatus for soldering rare-earth barium copper oxide (REBCO) tapes. The apparatus was...
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Sumit Chand (Research Scholar)7/2/25, 2:30 PMPoster
In this study, different types of joints (lap joint and bridge joint) using commercially available second-generation (2G) high-temperature superconductor (HTS) tapes from two manufacturers were prepared, and their I-V characteristics were studied at 77 K, liquid nitrogen temperature. Both types of joints were prepared by taking each sample of HTS tapes with effective overlapping lengths...
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