Angular dependence ofE–Jcharacteristics and dissipative properties in Bi-2223/Ag tape

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We study the angular dependence of E – J characteristics and dissipative properties due to thermal disturbance in the Bi-2223/Ag multifilamentary tape in the low-voltage region. In order to simulate the dissipative properties, we take into account the analytical expressions of the E – J characteristics as a function of temperature, external magnetic field and field direction, which agree well with the experimental data. It is shown that the simulation results of the dissipative properties agree with the experimental data semi-quantitatively. The relationship between the current sharing rate and its contribution to the temperature increase is also discussed, based on the simulation. These results are crucial for high- T c superconducting power application systems with a persistent current mode where even low-power dissipation is detrimental to the performance.