Generation of electron beam plasma inside a dielectric container

Plasma generation inside a cylindrical dielectric container filled with a gas by injecting a thin continuous electron beam along the container axis (z-axis) is experimentally investigated. Quartz glass tubes are used as the container, air is the plasma-generating medium. The plasma excitation is studied within wide range of gas pressure Pm = 10-1 - 2 · 101 Torr. Longitudinal distributions of the luminescence intensity B(z) of the container wall and its temperature Tw(z) are studied. It was found that both of thesefunctions have maxima whose positions depend on Pm, but the maxima B(z) and Tw(z) can be at different distances z.