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Abstract <p>Maintaining material balance is a critical issue in magnetic confinement experiments of high-temperature plasma. A promising method is to use a Marshall gun [<CitationRef CitationID="CR1">1</CitationRef>, <CitationRef CitationID="CR2">2</CitationRef>], which makes it possible to create bunches of plasma with a duration of several milliseconds, a concentration of <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(10^{15}-10^{16}\)</EquationSource> <!--LobJMat2561456Chernoshtanov-m1--> </InlineEquation> cm<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\({}^{-3}\)</EquationSource> <!--LobJMat2561456Chernoshtanov-m2--> </InlineEquation>, and a mean velocity of several hundred kilometers per second. Such a plasma bunch can effectively penetrate the central region of the trap. In this report we present the results of numerical modeling of plasma bunch injection from a Marshall gun into a mirror machine along the magnetic field. The simulations were motivated by experiments with hydrogen injection along a magnetic field in the Gas Dynamic Trap [<CitationRef CitationID="CR3">3</CitationRef>]. The simulations were performed in axisymmetric geometry using the axisymmetric hybrid numerical code. Although modeling with an axisymmetric numerical code can not capture three dimensional effects as magnetohydrodynamic and kinetic instabilities. Nevertheless it shows the evolution of gun ions and fast ion populations in the important case where instabilities do not develop.</p>

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Numerical Simulation of Plasma Injection into an Axisymmetric Magnetic Mirror Machine along the Axis

  • 期刊论文

  • 发表日期：

    2026年1月1日

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  • I. S. Chernoshtanov,
  • M. A. Boronina,
  • T. V. Liseykina,
  • V. A. Vshivkov,
  • I. G. Chernykh

摘要

Abstract

Maintaining material balance is a critical issue in magnetic confinement experiments of high-temperature plasma. A promising method is to use a Marshall gun [1, 2], which makes it possible to create bunches of plasma with a duration of several milliseconds, a concentration of \(10^{15}-10^{16}\) cm \({}^{-3}\) , and a mean velocity of several hundred kilometers per second. Such a plasma bunch can effectively penetrate the central region of the trap. In this report we present the results of numerical modeling of plasma bunch injection from a Marshall gun into a mirror machine along the magnetic field. The simulations were motivated by experiments with hydrogen injection along a magnetic field in the Gas Dynamic Trap [3]. The simulations were performed in axisymmetric geometry using the axisymmetric hybrid numerical code. Although modeling with an axisymmetric numerical code can not capture three dimensional effects as magnetohydrodynamic and kinetic instabilities. Nevertheless it shows the evolution of gun ions and fast ion populations in the important case where instabilities do not develop.