| Summary: | In this paper, the lattice Boltzmann method is used to simulate the diffusion and ionization process of a two-dimensional energetic electron beam that is injected into the background gases under the sub-atmospheric pressure, and the characteristics of such plasmas are revealed. It is found that the penetration distance of the electron beam from the exit of the electron beam reduced to 10% of the maximum value at the axis is about 35 cm, whereas the envelope of the plasma distribution is like a spindle with the penetration distance of about 130 cm, under the pressure of 5 kPa. The gas pressure has a significant impact on the penetration distance of the electron beam and the plasma that is produced. The increase in gas pressure will reduce the penetration distance of the electron beam and the plasma because higher pressure will increase the collisional probability between the electrons and the gas molecules, and the energy transfer becomes stronger.
|
|---|
