SIMULATION OF A HIGH-CURRENT NON-SELF-SUSTAINED GLOW DISCHARGE WITH A HOLLOW CATHODE AT LOW PRESSURE
The paper introduces the results of theoretical and computer modeling of a high-current, non-self-sustaining, low-pressure glow discharge in a plasma source. The analytical model reflects the main principles and shows the relationship between plasma parameters in a hollow cathode. The paper demonstr...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Tomsk Polytechnic University
2023-06-01
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| Series: | Известия Томского политехнического университета: Промышленная кибернетика |
| Subjects: | |
| Online Access: | https://indcyb.ru/journal/article/view/24/20 |
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| Summary: | The paper introduces the results of theoretical and computer modeling of a high-current, non-self-sustaining, low-pressure glow discharge in a plasma source. The analytical model reflects the main principles and shows the relationship between plasma parameters in a hollow cathode. The paper demonstrates application of drift-diffusion representation for numerical simulation of low-pressure plasma generation in a plasma cathode of an electron source based on an arc discharge and in the hollow cathode of a non-self-sustaining glow discharge. It is shown that distribution of emission plasma density distribution in an electron current source is controlled by a redistributing electrode located inside it. Glow discharge plasma density distribution significantly depends on the geometric factor (shape of a cathode, anode, emissive surface of an electron source) and on electron current source location. The agreement between the results of computer modeling and experiments indicates a possibility of using mathematical modeling in optimizing existing and developing new plasma sources with the least degree of inhomogeneity in plasma distribution of the main (glow) discharge in the discharge cathode cavity. This is extremely important for technological application of large-volume hollow cathodes (more than 0.2 m3) plasma sources. |
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| ISSN: | 2949-5407 |