2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/52366We show that the frame of the Kerr spinning particle consists of two topologically coupled strings. One of them is the Kerr singular ring representing a string with an orientifold world-sheet. It has electromagnetic excitations (traveling waves), which corresponds to the old model of the Kerr's microgeon. The excitations induce the appearance of the extra axial string which is topologically coupled to the Kerr circular string and is a carrier of pp-waves and fermionic zero modes. This string can be described by the Witten field model for superconducting strings.Latex, 6 pages, 2 figures, based on the talk at the Workshop ``Supersymmetries and Quantum Symmetries'', Dubna,July 2003, v.2:one specification and misprint removedHigh Energy Physics - TheoryGeneral Relativity and Quantum CosmologyHigh Energy Physics - Phenomenologytext