PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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On characteristics of sheath damping near a dielectric wall with secondary electron emission |
Yu Da-Ren(于达仁)a), Qing Shao-Wei(卿绍伟) a)†, Yan Guo-Jun(闫国军)a), and Duan Ping(段萍) b) |
a School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China; b School of Physics, Dalian Maritime University, Dalian 116024, China |
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Abstract A preliminary investigation is conducted to study the characteristics of sheath damping near a dielectric wall with secondary electron emission (SEE). Making use of the linear analysis of the sheath stability, we have found two major contributions to the sheath damping, one similar to the Landau damping in uniform plasmas and another determined by local electric field and electron density of the steady-state sheath. It indicates that in a classical sheath regime the damping in the sheath region monotonically increases towards the wall and decreases with the enhancement of SEE effect. In order to verify the theoretical analysis, sheath oscillation processes induced by an initial disturbance are simulated with a time-dependent one-dimensional (1D) sheath model. Numerical results obtained are consistent with the theoretical analysis qualitatively.
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Received: 15 October 2010
Revised: 21 December 2010
Accepted manuscript online:
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PACS:
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52.40.Kh
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(Plasma sheaths)
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52.35.Fp
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(Electrostatic waves and oscillations (e.g., ion-acoustic waves))
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52.25.Dg
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(Plasma kinetic equations)
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Fund: Project supported by the National Natural Science Foundation for Distinguished Young Scholars (Grant No. 50925625), the National Natural Science Foundation of China (Grant Nos. 10975026 and 10875024), and the Scientific Research Foundation of the Higher Educational Institutions of Liaoning Education Bureau of China (Grant No. 2009A047). |
Cite this article:
Yu Da-Ren(于达仁), Qing Shao-Wei(卿绍伟), Yan Guo-Jun(闫国军), and Duan Ping(段萍) On characteristics of sheath damping near a dielectric wall with secondary electron emission 2011 Chin. Phys. B 20 065204
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