Effect of irradiation with 132Xe27+ ions at different angles on the critical parameters of second generation HTSC tapes basedon GdBa2Cu3O7–x

The effect of irradiation with 132Xe27+ ions (167 MeV) at angles of 20°, 30°, 60°, and 90° to the tape surface on the critical parameters of second-generation superconducting tapes based on the SuperOx GdBa2Cu3O7–x compound has been studied. The dependences of the critical current (Ic) at T = 77 K in the intrinsic magnetic field and the critical temperature (Tc) on the ion irradiation fluences at different irradiation angles are obtained. At all studied irradiation angles, a small (up to ~ 5 %) increase in the critical current of HTSC tapes is observed in the fluence range from 3.4·108 to 5·109 ion/cm2. The radiation resistance of a superconductor to ion irradiation is determined as a function of the irradiation angle. To determine the radiation resistance of the tape, the threshold irradiation fluence Φth was measured, at which the critical current tends to zero. The dependence of Φth on the irradiation angle α is well approximated by the formula: Φth = Φ0 + A·exp(–α/t).