Effects of proton irradiation and ageing on the superconducting properties of single crystalline and polycrystalline MgB2

G. K. Perkins, Y. Bugoslavsky, A . D. Caplin +7

We present magnetisation data on crystalline and polycrystalline MgB2 before and after irradiation with ~1MeV protons. In the virgin crystal the critical current density is below o…