Coupled Analysis Method for High-Field Magnet Coil Using Coated Conductor Based on $J\hbox{-}E$ Characteristics as a Function of Temperature, Magnetic Field Vector and Mechanical Strain

We have characterized nonlinear current transport properties in a coated conductor as a function of temperature, magnetic field vector and mechanical strain, and then have developed a thermally-electromagnetically-structurally coupled analysis code for a high-field magnet coil. The distributions of heat generation and electromagnetic force in the coil are computed by electromagnetic analysis. Then, the temperature distribution and the strain distribution are correspondingly calculated by thermal analysis and by structural analysis. Furthermore, both of them are fed back to the electromagnetic analysis. These analyses are based on finite element method, and are repeated until the convergence. By taking a design example of a 40 T class magnet coil using a GdBCO coated conductor, we have discussed the necessity of the consideration of thermally-structurally influenced transport properties in the coil for the coil design.

[1]  S. Nagaya,et al.  Performance Improvement of YBCO Coil for High-Field HTS-SMES Based on Homogenized Distribution of Magnetically-Mechanically Influenced Critical Current , 2008, IEEE Transactions on Applied Superconductivity.

[2]  Xiaotao Liu,et al.  High Field Superconducting Solenoids Via High Temperature Superconductors , 2008, IEEE Transactions on Applied Superconductivity.

[3]  T. Kiyoshi,et al.  High-Field Magnet Design Under Constant Hoop Stress , 2008, IEEE Transactions on Applied Superconductivity.

[4]  Yutaka Yamada,et al.  Present status and future prospect of coated conductor development and its application in Japan , 2008 .

[5]  Y. Shiohara,et al.  GdBCO and YBCO long coated conductors and coils , 2007 .

[6]  V. Selvamanickam,et al.  Progress in scale-up of second-generation HTS conductor , 2007 .

[7]  T. Nakamura,et al.  Current Transport Properties of 200 A-200 m-Class IBAD YBCO Coated Conductor Over Wide Range of Magnetic Field and Temperature , 2007, IEEE Transactions on Applied Superconductivity.

[8]  S. Nagaya,et al.  Conceptual Design of HTS Coil for SMES Using YBCO Coated Conductor , 2007, IEEE Transactions on Applied Superconductivity.

[9]  Y. Shiohara,et al.  Properties of Long GdBCO Coated Conductor by IBAD-PLD Method—The First GdBCO Coil Test , 2007, IEEE Transactions on Applied Superconductivity.

[10]  S. Nagaya,et al.  Stress Tolerance and Fracture Mechanism of Solder Joint of YBCO Coated Conductors , 2007, IEEE Transactions on Applied Superconductivity.

[11]  B. Seeber,et al.  Critical currents versus applied strain for industrial Y-123 coated conductors at various temperatures and magnetic fields up to 19 T , 2006 .

[12]  V. Selvamanickam,et al.  Reversible axial-strain effect in Y–Ba–Cu–O coated conductors , 2005, IEEE Transactions on Applied Superconductivity.

[13]  Q. Jia,et al.  Angular-dependent vortex pinning mechanisms in YBa2Cu3O7 coated conductors and thin films , 2003, cond-mat/0310568.

[14]  M. Takeo,et al.  Critical current properties in HTS tapes , 2003 .

[15]  Saito Takashi,et al.  Curitical Current Properties of a YBCO Coated Conductor in High Magnetic Fields , 2002 .

[16]  F. Irie,et al.  Critical Current Properties in High Tc Superconductors , 1999 .

[17]  F. Irie,et al.  Transport characteristics and flux dynamics in high T/sub c/ superconductors under the influence of pin fluctuation , 1997, IEEE Transactions on Applied Superconductivity.

[18]  K. Yamafuji,et al.  Current-voltage characteristics near the glass-liquid transition in high-Tc superconductors , 1997 .

[19]  J. Ekin,et al.  Strain scaling law for flux pinning in practical superconductors. Part 1: Basic relationship and application to Nb3Sn conductors , 1980 .