Recovery capability of multifilamentary superconductors with non-uniform void distribution

The effects of several abnormal conditions resulting from a possible non-uniform void distribution in a multifilamentary and cabled superconductor on the cryogenic recovery capability of a triplex, a seven strand bundle and a 19 strand bundle were studied. For a triplex, if only one of the three strands was cooled, the maximum recoverable initial normal temperature is reduced by 1/3 of the value for the nominal case in which all the three strands are cooled equally. If the outer six strands of a seven strand bundle were cooled and the center one was not cooled, the recovery capability of this bundle is just slightly below that of the nominal triplex. If only the outer 12 strands of a 19 strand bundle were cooled, the bundle would not recover once it is driven normal. The effects of the cold and stagnant helium located in the space between the strands and of the insulation thickness are small.