INHOMOGENEOUS CURRENT DISTRIBUTION IN AG BI2223 TAPE/

In order to investigate the inhomogeneous current distribution in the silver sheathed Bi2223 tapes, a scanning Hall probe measurement was ca rried out. The z component of self magnetic field was converted to the local current density, of which the spatial change comprised two char acteristic features. The inhomogeneity of longitudinal current distrib ution along the current flow was suggested to be attributed to the pos itional change of oxide layer thickness due to the work instability. T ransverse current distribution is caused from the degree of misalignme nt of Bi2223 layered grains as well as the distribution of non-superco nducting phases.