[en] Experimental results of investigation of superconducting destruction in YBa₂Cu₃O_7-x-ceramics by a pulse magnetic field with H=300 Tl are presented. Registration of magnetic moment M and external field H was carried out by the induction methods and the presence of a superconducting phase in a cylindrical specimen is determined according to the existence of s-like specific features on curve d²M/dt² during short-term retardation of the increase of the external magnetic field. Determined in such a way fields H₂₂ for T=4.2 and 77 K were equal to 180±36 Tl and 48±10 Tl correspondingly

[en] The paper discusses the methods and results of numerical simulations used in the development of a helical-coaxial explosive magnetic cumulative generator (EMG) with the stator up to 720 mm in diameter. In the process of designing, separate units were numerically modeled, as was the generator operation with a constant inductive-ohmic load. The 2-D processes of the armature acceleration by the explosion products were modeled as well as those of the formation of the sliding high-current contact between the armature and stator's insulated turns. The problem of the armature integrity in the region of the detonation waves collision was numerically analyzed. 8 figs., 2 refs