Numerical Study of Screening Current on HTS Stellarator Coil and Experimental Validation Through Screening Current Induced Voltage
This study presents a numerical model for simulating screening current distribution in REBCO stellarator coils using a distributed-circuit approach with widthwise segmentation. By applying an equipotential assumption along the conductor‘s width, which can generally be applied, the model reduces the number of circuit elements, enabling efficient calculation of electromagnetic and thermal parameters such as current distribution and AC loss within a short time. Experimental validation using a 1/20-scale stellarator coil confirmed the model's accuracy in predicting the effects of screening current on voltage profiles during repeated operations. The results indicate that voltage measurements can effectively estimate screening currents in high-temperature superconducting (HTS) magnets.
Authors
- Nicolò Riva (ORCID: https://orcid.org/0000-0002-3359-7013)
- Geonyoung Kim (ORCID: https://orcid.org/0000-0003-4785-3804)
- Chaemin Im (ORCID: https://orcid.org/0000-0002-3591-9805)
- Jung Tae Lee (ORCID: https://orcid.org/0000-0001-6394-5325)
- Yufan Yan (ORCID: https://orcid.org/0000-0001-9647-5622)
- Seungyong Hahn (ORCID: https://orcid.org/0000-0002-4511-4162)
- Jeseok Bang (ORCID: https://orcid.org/0000-0002-4761-6334)
- Dongwoo Lee (ORCID: https://orcid.org/0009-0007-9098-2499)
- Sang‐Jin Lee (ORCID: https://orcid.org/0000-0001-7554-1037)
- Jaemin Kim (ORCID: https://orcid.org/0000-0003-3633-9455)
- Hyunsoo Park (ORCID: https://orcid.org/0000-0002-6521-3512)
- Wonseok Jang (ORCID: https://orcid.org/0009-0008-9815-6949)
- S. Cho (ORCID: https://orcid.org/0000-0002-6643-6670)
- Nicolò Foppiani
- Wei Guo (ORCID: https://orcid.org/0009-0000-0457-9070)
Institutions
- Florida State University (US)
- Seoul National University (KR)
- National High Magnetic Field Laboratory (US)
Publication Details
- Journal
- IEEE Transactions on Applied Superconductivity
- Published
- 2025-01-29
- DOI
- https://doi.org/10.1109/tasc.2025.3535859
- Primary Topic
- Superconducting Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00