Implosion of multiwire nested arrays is simulated in a series of numerical experiments with 3D models carried out by means of RMHD code MARPLE-3D (Keldysh Institute of Applied Mathematics). Plasma emission is reproduced via prolonged plasma ablation model, the distinction of wires in nested arrays is implemented. The numerical results are compared with the experimental data obtained at Angara-5-1 facility (TRINITI, Troitsk). The qualitative and quantitative agreement of the simulation results with experimental data and theoretical estimates is shown. Two-cascade nested array design allows a stable compact compression. Between the cascades a shock wave is formed, which damps the inhomogeneities of the plasma jets. The effect is also observed when the external and internal cascades are of the same material. The decrease in the trailing mass is more significant in the case of a quasi-spherical array.

magnetohydrodynamics, Z-pinch, nested wire arrays

Mathematical modelling in actual problems of science and technics

Olkhovskaya Olga Gourgenovna,  ,  orcid.org/0000-0002-1318-4596,  KIAM RAS