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MHD processes during the cascade development of the neck and hot spot in an X-pinch

  • Plasma Dynamics
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Abstract

Results are presented from two-dimensional MHD simulations of X-pinch implosion. The simulations were performed in the (r, z) and (x, y) geometries for homogeneous (dense plasma) and heterogeneous (core-corona) loads. The formation of a minidiode, the development of a neck and an X-radiating hot spot, and the influence of the plasma corona on the implosion dynamics of the dense X-pinch plasma were investigated. For through simulations, the conical neck model was used, whereas a detailed analysis of the X-ray burst was performed in the parabolic neck model. The MHD processes occurring during the implosion of oblique shock waves and the onset of instability of the plasma column were examined. It is found that, due to the quasi-periodic character of these processes, the neck compression proceeds in a cascade fashion. The plasma state in a hot spot just before the break of the neck is analyzed, and the possibility of generating fast particle beams is considered.

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Authors and Affiliations

  1. Lebedev Physical Institute, Russian Academy of Sciences, Leninskiĭ pr. 53, Moscow, 117924, Russia

    G. V. Ivanenkov & S. Yu. Gus’kov

  2. Kaliski Institute of Plasma Physics and Laser Microfusion, Hery str. 23, P.O. Box 49, 00-908, Warsaw, Poland

    W. Stepniewski

Authors
  1. G. V. Ivanenkov
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  2. W. Stepniewski
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  3. S. Yu. Gus’kov
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Original Russian Text © G.V. Ivanenkov, W. Stepniewski, S.Yu. Gus’kov, 2008, published in Fizika Plazmy, 2008, Vol. 34, No. 8, pp. 675–694.

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Ivanenkov, G.V., Stepniewski, W. & Gus’kov, S.Y. MHD processes during the cascade development of the neck and hot spot in an X-pinch. Plasma Phys. Rep. 34, 619–638 (2008). https://doi.org/10.1134/S1063780X08080011

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  • DOI: https://doi.org/10.1134/S1063780X08080011

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