Numerical Simulation of Abrikosov Vortex at Columnar Defect in Superconductor V.A. Fedirko, S.V. Polyakov, A.L. Kasatkin and M.V. Fedirko EPJ Web Conf., 224 (2019) 02007 Published online: 09 December 2019 DOI: 10.1051/epjconf/201922402007