Numerical simulation of a direct current glow discharge in atmospheric pressure helium
Characteristics of a direct current （DC） discharge in atmospheric pressure helium are numerically investigated based on a one-dimensional fluid model. The results indicate that the discharge does not reach its steady state till it takes a period of time. Moreover, the required time increases and the...
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| Published in | Chinese physics B Vol. 25; no. 12; pp. 332 - 336 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.12.2016
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| Subjects | |
| Online Access | Get full text |
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| Summary: | Characteristics of a direct current （DC） discharge in atmospheric pressure helium are numerically investigated based on a one-dimensional fluid model. The results indicate that the discharge does not reach its steady state till it takes a period of time. Moreover, the required time increases and the current density of the steady state decreases with increasing the gap width. Through analyzing the spatial distributions of the electron density, the ion density and the electric field at different discharge moments, it is found that the DC discharge starts with a Townsend regime, then transits to a glow regime. In addition, the discharge operates in a normal glow mode or an abnormal glow one under different parameters, such as the gap width, the ballast resistors, and the secondary electron emission coefficients, judged by its voltage-current characteristics. |
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| Bibliography: | Zeng-Qian Yin,Yan Wang, Pan-Pan Zhang, Qi Zhang, and Xue-Chen Li（1 Department of Mathematics and Physics, North China Electric Power University, Baoding 071003, China 2 College of Physics Science ＆ Technology, Hebei University, Baoding 071002, China） Characteristics of a direct current （DC） discharge in atmospheric pressure helium are numerically investigated based on a one-dimensional fluid model. The results indicate that the discharge does not reach its steady state till it takes a period of time. Moreover, the required time increases and the current density of the steady state decreases with increasing the gap width. Through analyzing the spatial distributions of the electron density, the ion density and the electric field at different discharge moments, it is found that the DC discharge starts with a Townsend regime, then transits to a glow regime. In addition, the discharge operates in a normal glow mode or an abnormal glow one under different parameters, such as the gap width, the ballast resistors, and the secondary electron emission coefficients, judged by its voltage-current characteristics. direct current discharge, one-dimensional fluid model, Townsend regime, glow regime 11-5639/O4 |
| ISSN: | 1674-1056 2058-3834 |
| DOI: | 10.1088/1674-1056/25/12/125203 |