Model of beam formation in a glow discharge electron gun with a cold cathode

Investigation of electron-ion optics of pulse technological glow discharge electron guns

“…It's connected with physical properties of anode plasma in such type of discharges, where plasma boundary is usually considered as the surface with low potential and as ions source [6]. For diode high voltage glow discharge one-dimensional gap all formulas to defining the position of plasma boundary relatively to the cathode surface have been obtained in work [7].…”

“…With applying Gumel method for equation system (9 -12) space charge in discharge gap is calculated by using equations [6,10]:…”

“…The electron beam trajectories in anode plasma is calculated by its' extension inside the plasma volume and taking into account Rutherford scattering [6,10]. Then destination of focus of electron beam is calculated numerically by finding minimal thickness of formed electrons' flow [6,10].…”

“…Then destination of focus of electron beam is calculated numerically by finding minimal thickness of formed electrons' flow [6,10]. Distribution of beam current density in the focal plane is presented at Fig.…”

“…5 dependences, which have been obtained as simulation results, it is clear, that in pulse glow discharge electron guns focal beam diameter is usually smaller, then 2 mm. Corresponded parameter to guns', operated in uninterrupted regime, is usually grater then 3 mm [6,10]. Therefore, taking into account, that electric control of beam power provided its fast regulation [4], using of pulse glow discharge electron guns in the modern electron beam technologies is very perspective.…”