Spectral characteristics of a short glow discharge with a grid anode

Abstract

In a previous study, the characteristics of plasma generated by fast electrons behind a grid anode with short glow discharge were studied using numerical simulation. The source of the post-anode plasma electrons is considered to be the direct current glow discharge itself in the gap between a cathode and a grid anode. However, the electron attenuation of the microwave radiation in the post-anode space measured in experiments does not correspond to the numerical predictions. In this paper, the current–voltage characteristics of the short glow discharge with a grid anode and the spectral characteristics of the discharge in both the electrode gap and the space behind the grid anode are studied; the effective thickness of the plasma in the post-anode space is estimated using a spectral method.

Spectral Characteristics of DC Short Glow Discharge Plasma With Grid Electrodes

“…The results presented in this article are a continuation of the studies carried out in [25]. The influence of helium pressure on the spectral characteristics of short glow discharge with grid electrode and the temperature distribution for electrons to be excited both in the electrode gap and in the space behind grid cathodes are investigated in this work.…”

“…The current-voltage characteristics of DC discharge with grid electrode have been studied early and presented elsewhere [25]. The discharge wa found to be in an abnormal glow discharge mode at a voltage of 250 V-400 V. When the discharge was maintained at these voltages, the glow of post-anode plasma could be observed with the naked eye behind the grid anode.…”

“…As short glow discharge between grid electrodes remained stable at a voltage of 275 V to 400 V, we used a direct voltage of 300 V to sustain glow discharge and generate plasma in the post-cathode space in this work. The experimental setup in this work was the same as that in [25], except that power supply poles were wrapped when connected to electrodes. To put it simple, the electrode 2 was anode in [25] but cathode in this work, and electrode 1 in [25] was cathode but anode in this work.…”

“…The experimental setup in this work was the same as that in [25], except that power supply poles were wrapped when connected to electrodes. To put it simple, the electrode 2 was anode in [25] but cathode in this work, and electrode 1 in [25] was cathode but anode in this work.…”

“…Our previous work focused on the spectral characteristics of short glow discharge with grid electrodes in helium both in the electrode gap and in the space behind the grid anode [25]. Using the intensity distributions of helium atom spectral lines behind grid anode, we estimated the effective penetration thickness of the electrons penetration in the post-anode space to be about 10 mm-14 mm for short glow discharge with an inter-electrode gap of 1 mm-5 mm.…”