中国物理B ›› 2011, Vol. 20 ›› Issue (6): 65204-065204.doi: 10.1088/1674-1056/20/6/065204

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇    下一篇

On characteristics of sheath damping near a dielectric wall with secondary electron emission

于达仁1, 卿绍伟1, 闫国军1, 段萍2   

  1. (1)School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China; (2)School of Physics, Dalian Maritime University, Dalian 116024, China
  • 收稿日期:2010-10-15 修回日期:2010-12-21 出版日期:2011-06-15 发布日期:2011-06-15
  • 基金资助:
    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).

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)   

  1. a School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China; b School of Physics, Dalian Maritime University, Dalian 116024, China
  • Received:2010-10-15 Revised:2010-12-21 Online:2011-06-15 Published:2011-06-15
  • Supported by:
    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).

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摘要： 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.

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.

Key words: plasma sheath, damping, electron electrostatic wave, secondary electron emission

中图分类号:  (Plasma sheaths)

  • 52.40.Kh
52.35.Fp (Electrostatic waves and oscillations (e.g., ion-acoustic waves)) 52.25.Dg (Plasma kinetic equations)