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.
Chernoshtanov et al. (2026) studied this question.