Research

Study of second generation, high-temperature superconducting coils : Determination of critical current


Reference:

Zhang, M., Kim, J.-H., Pamidi, S., Chudy, M., Yuan, W. and Coombs, T. A., 2012. Study of second generation, high-temperature superconducting coils : Determination of critical current. Journal of Applied Physics, 111 (8), 083902.

Related documents:

This repository does not currently have the full-text of this item.
You may be able to access a copy if URLs are provided below. (Contact Author)

Official URL:

http://dx.doi.org/10.1063/1.3698317

Abstract

This paper presents the modeling of second generation (2 G) high-temperature superconducting (HTS) pancake coils using finite element method. The axial symmetric model can be used to calculate current and magnetic field distribution inside the coil. The anisotropic characteristics of 2 G tapes are included in the model by direct interpolation. The model is validated by comparing to experimental results. We use the model to study critical currents of 2 G coils and find that 100 μV/m is too high a criterion to determine long-term operating current of the coils, because the innermost turns of a coil will, due to the effect of local magnetic field, reach their critical current much earlier than outer turns. Our modeling shows that an average voltage criterion of 20 μV/m over the coil corresponds to the point at which the innermost turns’ electric field exceeds 100 μV/m. So 20 μV/m is suggested to be the critical current criterion of the HTS coil. The influence of background field on the coil critical current is also studied in the paper.

Details

Item Type Articles
CreatorsZhang, M., Kim, J.-H., Pamidi, S., Chudy, M., Yuan, W. and Coombs, T. A.
DOI10.1063/1.3698317
DepartmentsFaculty of Engineering & Design > Electronic & Electrical Engineering
RefereedYes
StatusPublished
ID Code30519

Export

Actions (login required)

View Item