Hybrid Plasmas Generation Inside Dielectric Containers

Electron-beam plasma (EBP) inside dielectric containers is considered in the context of the plasma chemical reactors design. Both still and intermittent electron beams (EBs) were used to excite strongly nonequilibrium plasmas by their injection into still or moving plasma generating media. The EB was injected along a cylindrical vessel or channel filled with a gas at pressure up to 50 Torr. Additives (extra gases, vapors, or sprayed liquids) were injected into the container, if required, and an external electromagnetic field could be superimposed on the EBP. Influence of the additives, gas flow velocity, external electromagnetic field, and the EB pulses (in the intermittent modes of the EBP generation) are considered in terms of plasma density control and plasma decay characteristics. The instabilities in the EBP filling the dielectric container are described. Basic configuration of the experimental setup and experimental arrangement are given; a number of images of the plasmas in various regimes of the setup operation are presented.