Copper-sheathed wires, prepared by an in-situ process, were exposed to neutron radiation in order to introduce defects into the superconductor. The high level of disorder (4.6 x 10-2dpa) led to a decrease in the transition temperature of more than 4K, and to an increase in the slope of the irreversibility line; thus resulting in higher irreversibility fields at low temperatures. The transport currents were significantly enhanced at 4.2K for fields above 2T.

Enhanced Transport Currents in Cu-Sheathed MgB2 Wires. M.Eisterer, B.A.Glowacki, H.W.Weber, L.R.Greenwood, M.Majoros: Superconductor Science and Technology, 2002, 15, 1088-91