Low-energy plasma-cathode electron gun with a perforated emission electrode
Abstract
We describe research of influence of the geometric parameters of perforated electrode on emission parameters of a plasma cathode electron gun generating continuous electron beams at gas pressure 5-6 Pa. It is shown, that the emission current increases with increasing the hole diameters and decreasing the thickness of the perforated emission electrode. Plasma-cathode gun with perforated electron can provide electron extraction with an efficiency of up to 72 %. It is shown, that the current-voltage characteristic of the electron gun with a perforated emission electrode differs from that of similar guns with fine mesh grid electrode. The plasma-cathode electron gun with perforated emission electrode is used for electron beam welding and sintering.
- Publication:
-
Prospects of Fundamental Sciences Development (PFSD-2017)
- Pub Date:
- November 2017
- DOI:
- 10.1063/1.5009856
- Bibcode:
- 2017AIPC.1899d0001B