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Abstract <p>The paper presents a complex study of the Hall effect during the expansion of a spherical plasma cloud into a medium with a uniform external magnetic field. The results were obtained in a laboratory experiment on the KI-1 plasma facility and three-dimensional numerical modeling using the “particle-in-cell” method. The data obtained are in good qualitative and quantitative agreement and demonstrate that when the plasma cloud expands in a regime where Larmor radius of ions <i>R</i><sub>L</sub> is comparable to scale of the diamagnetic cavity <i>R</i><sub><i>b</i></sub>, a large-scale antisymmetric magnetic fields structure is formed, which is caused by Hall effects. In this case, both internal and external Hall magnetic structures are observed. The work demonstrates the coherence between Hall effects and the diamagnetic cavity collapse, which occurs as the transfer of a magnetic field by Hall electrons currents at an anomalously high speed.</p>

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Generation and Dynamics of the Hall Magnetic Field during Sub-Alfvén Plasma Expansion in the Kinetic Regime

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • A. V. Divin,
  • A. A. Chibranov,
  • I. P. Paramonik,
  • Yu. P. Zakharov,
  • A. G. Berezutsky,
  • V. G. Posukh,
  • M. S. Rumenskikh,
  • J. A. Kropotina,
  • I. F. Shaikhislamov

摘要

Abstract

The paper presents a complex study of the Hall effect during the expansion of a spherical plasma cloud into a medium with a uniform external magnetic field. The results were obtained in a laboratory experiment on the KI-1 plasma facility and three-dimensional numerical modeling using the “particle-in-cell” method. The data obtained are in good qualitative and quantitative agreement and demonstrate that when the plasma cloud expands in a regime where Larmor radius of ions RL is comparable to scale of the diamagnetic cavity Rb, a large-scale antisymmetric magnetic fields structure is formed, which is caused by Hall effects. In this case, both internal and external Hall magnetic structures are observed. The work demonstrates the coherence between Hall effects and the diamagnetic cavity collapse, which occurs as the transfer of a magnetic field by Hall electrons currents at an anomalously high speed.