Conveners
Fri-Mo-Po.01 - No-Insulation Coils IV
- Bryce Fledderman (General Atomics)
- Itaru Abe (Toshiba Energy Systems & Solutions Corporation)
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Peng Song (Tsinghua University)04/07/2025, 09:30Poster
No-insulation (NI) coils are known for their high thermal stability and self-protecting features due to turn-to-turn contacts. Parallel co-winding is a promising method to reduce the charging delay of NI coils while maintaining thermal stability. This technique shows significant potential for applications in fusion and other large-scale or high-field magnets. In parallel co-wound NI coils, the...
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Jung Tae Lee (Seoul National University, Republic of Korea)04/07/2025, 09:30Poster
The estimation of critical current ($I_c$) and the index value for single-tape wound coils and magnets is relatively straightforward. However, for multi-tape co-wound coils, the process becomes complex due to various factors influencing current distribution within the coil. This study conducts a numerical analysis to explore these factors and their impact on the $I_c$ and index value of...
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Kibum Choi04/07/2025, 09:30Poster
No-insulation (NI) high temperature superconductor (HTS) coils are characterized by their turn-to-turn contact resistivity, leading to circuit-based models composed primarily of resistors and inductors. In a simplified lumped circuit representation, NI HTS coils can be modeled as variations of RL circuits, yielding voltage responses governed by a single-valued time constant. However,...
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Xinxing Qian (High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences), Zhaofei Jiang (High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences)04/07/2025, 09:30Poster
No-insulation REBCO (NI-REBCO) coils, with self-protecting capabilities during quench, have attracted significant interest and shown considerable potential for high-field applications. As research advances, it has become increasingly evident that uneven stress/strain induced by screening currents is a critical factor affecting the performance of NI-REBCO coils. Therefore, reducing...
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Hiroyasu Kobayashi (Chiba University)04/07/2025, 09:30Poster
No-Insulation (NI) coil utilizing HTS tape conductor has become a promising option for high-field magnets, capable of delivering both excellent thermal stability and high current density. NI coil can reduce heat generation due to a current behavior that bypasses the defect when a local hot-spot is formed in HTS tape conductor. In the high-field magnet application, a coil structure with large...
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Dr Tianli Dai (Institute of Plasma Physics, Chinese Academy of Sciences)04/07/2025, 09:30Poster
No-insulated high temperature superconducting (HTS) coils are widely favored for high engineering current density and self-protection properties. Radial stress is an important parameter for HTS coils, which is mainly the superposition of winding tension, electromagnetic load and thermal stress. Radial stress is related to the magnet transient behavior and the self-protection characteristics of...
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Daniel Louis Arthur Biek (EPFL, Swiss Plasma Center)04/07/2025, 09:30Poster
Due to the increasing interest in nuclear fusion, basic plasma experiments/small scale devices are good to illustrate plasma physics properties like magnetic surfaces and/or the importance of it. The construction of a table-top stellarator experiment, referred to as Polaris, is envisaged for the Swiss Plasma Center of EPFL. Polaris (major radius ~40cm and minor radius ~15cm) consists...
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J.H. Wan04/07/2025, 09:30Poster
Rare-earth-based barium copper oxide (REBCO) coated conductors have shown remarkable high in-field performance in current transport and tensile strength, and their application as a layer-wound insert magnet during the construction of a high-field superconducting magnet is reasonably expected. However, the inhomogeneous stress distribution induced by the screening current, coupled with...
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