| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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A kinetic simulation study of glow discharges within millimeter-scale hollow anode |
| Yaoyu Ren(任耀宇)1 and Chaohui Lan(蓝朝晖)1,2,† |
1 School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;
2 State Key Laboratory of Space Environment Interaction with Matters, Harbin Institute of Technology, Harbin 150001, China |
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Abstract This paper presents a numerical simulation of DC glow discharge at 2 Torr (1 Torr = 1.33322$\times10^2$ Pa) with a microhollow anode, using a two-dimensional (2D) PIC/MCC code to explore the impact of the hollow anode structure on discharge characteristics. Simulation results show that the plasma density in the anode channel decreases exponentially along the $x$-direction towards the outlet while the electric potential decreases linearly. The electron temperature, derived from the relationship between density and electric potential, shows a good agreement with the calculated temperature. The potential peak at the inlet, along with the grounded anode, forms a transverse potential well that draws electrons toward the center of the channel. The $x$-direction electric field, generated by the potential difference between the inlet and outlet of the anode, directs electrons toward the inlet of the anode. Low-energy electrons are confined within the potential well, while very few high-energy electrons outlet the channel. The hollow anode structure serves as a collimator for electrons, leading to an increment of moderate-velocity electron flux in the anode channel. Shortening the anode leads to a slower rate of density decrease, resulting in a higher density at the outlet.
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Received: 21 January 2025
Revised: 21 March 2025
Accepted manuscript online: 08 April 2025
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PACS:
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52.65.-y
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(Plasma simulation)
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51.50.+v
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(Electrical properties)
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52.80.Hc
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(Glow; corona)
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| Fund: Project partially supported by the National Natural Science Foundation of China (Grant Nos. 12275060 and 12075223) and the Fund from Frontier Science Center for Interaction between Space Environment and Matter (Grant No. 5740401024). |
Corresponding Authors:
Chaohui Lan
E-mail: lanchaohui@hit.edu.cn
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Cite this article:
Yaoyu Ren(任耀宇) and Chaohui Lan(蓝朝晖) A kinetic simulation study of glow discharges within millimeter-scale hollow anode 2025 Chin. Phys. B 34 075203
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