Evidence that transverse variability of critical current density can greatly mitigate screening current stress in high field REBCO magnets

J Bang, J Lee, G Bradford, K Kim, X Hu, D Abraimov… - Scientific Reports, 2024 - nature.com
Plastic damage of REBCO (REBa2Cu3O7-x, where RE= rare earth) coated conductors by
screening current stress (SCS) is a significant concern for ultra-high-field superconducting …

Harmonic errors of a 9.4 T all-REBCO NMR magnet affected by screening current and geometric inconsistency of coated conductors

J Bang, J Kim, JY Jang, M Ahn, YJ Hwang, K Kim… - Scientific Reports, 2024 - nature.com
Abstract REBa 2 Cu 3 O 7-x (REBCO, RE= rare earth)-coated conductor is a competitive
option in terms of current-carrying capacity and high-stress durability in developing high …

2D axisymmetric electromagnetic modeling of HTS coils based on TA formulation with modified Newman boundary conditions

Y Chen, Q Wang, K Wang, B Zhou, S Liu… - Superconductor …, 2024 - iopscience.iop.org
The TA formulation based on thin film approximation has been widely used in
electromagnetic modeling of high temperature superconducting (HTS) coated conductors …

An experimental study to investigate magnetic field and winding force-dependent contact resistance of NI REBCO coil

J Bang, G Bradford, J Lee… - … Science and Technology, 2024 - iopscience.iop.org
An experimental study to investigate magnetic field and winding force-dependent contact
resistance of NI REBCO coil - IOPscience This site uses cookies. By continuing to use this site …

Elastic-plastic conductor damage evaluation at over 0.4% strain using a high-stress REBCO coil

J Bang, G Bradford, K Kim, J Lee… - Superconductor …, 2024 - iopscience.iop.org
Recent reports on screening current stress simulations of high-field REBCO magnets
frequently present peak stresses over 1 GPa. However, this result is probably an unrealistic …

Study of the demagnetization behavior of no-insulation persistent-current mode HTS coils under external AC fields by 3D FEM simulation

Z Zhong, W Wu, G Ma, Z Jin - Superconductor Science and …, 2024 - iopscience.iop.org
The no-insulation (NI) winding technique is promising for applications in the persistent-
current mode (PCM) operation of high-temperature superconducting (HTS) coils. To produce …

The Effect of Field-Dependent -Value on Screening Current, Voltage, and Magnetic Field of REBCO Coil

J Bang, K Kim, G Bradford, J Lee… - IEEE Transactions …, 2024 - ieeexplore.ieee.org
Here we report the effect of field-dependent index value on screening current and
consequential NI REBCO coil behavior. Through the 'Little Big Coil (LBC)'framework, an …

Exploration of the influence factors on contact resistance obtained from sudden discharge test on the large-bore metal-as-insulation REBCO magnet

S Liu, L Wang, Z Zhang, L Wang, B Zhou… - Superconductor …, 2024 - iopscience.iop.org
In this paper, the factors affecting the evaluation of the equivalent contact resistance of the
magnet were investigated by sudden discharge tests in a large-bore conduction-cooled …

A FEM Simulation Model to Calculate Local Currents and Voltages of NI REBCO Coil With Both Screening Current and Transverse Current Considered

J Bang - IEEE Transactions on Applied Superconductivity, 2024 - ieeexplore.ieee.org
Numerical simulations of no-insulation REBCO magnet should be able to calculate the
transverse current flowing along the turn-to-turn contact path and screening current induced …

Experimental Study for Modified Lumped-Circuit Model to Analyze Saddle-Shaped No-Insulation HTS Coil Operated in Overcurrent Situation

G Kim, W Jung, J Koo, J Park, H Park… - IEEE Transactions …, 2023 - ieeexplore.ieee.org
This work presents a modified lumped-circuit model for a saddle-shaped no-insulation (NI)
high temperature superconductor (HTS) coil in overcurrent, which is defined by the situation …