Some peculiarities of plasma flow and acceleration in end-face and magnetoplasmodynamic accelerators under strong Hall effect

Some features of the dynamics and acceleration of plasma in end and magnetoplasmodynamic accelerators with an external axisymmetric magnetic field generated by a solenoid are considered. The plasma flow is analyzed within the framework of magnetic gasdynamics. It is shown that in the case of strong Hall effect, the electronic component of the plasma is “frozen” in an external magnetic field, and the plasma streamlines coincide with the magnetic surfaces. In this case, in an ideally conducting plasma, the initial distributions of the current density and mass flux are preserved along the vector lines of the magnetic field until the gradual decay of the jet. This leads to the removal of the current outside the accelerator channel and the formation of cathode and anode jets. A carryover of the current is also observed in the experiment. Ions are accelerated in the accelerators under consideration under the action of electron and ion pressure gradients. In the case of cold ions, their acceleration is determined in the first approximation by the ionization potential of the plasma ions.