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To further reveal the characteristics of sheath near the dielectric wall in Hall thruster discharge channel, a one-dimensional fluid sheath model combined with the velocity distribution function of electron emitted from wall is used to study the influence of secondary electron emission yield (SEEy) σ on the characteristics of double sheath near wall. Analytic results show that because of the contribution of secondary electron flux to the density of sheath electron, the sheath presents single-layer positive ion sheath formation when σ is lower than a critical SEEy σdc, and also presents double-layers formation that joins with positive ion sheath and electron sheath when σ>σdc. However, when σ further increases to 0.999, the sheath presents the formation of three-layers that are alternated by positive ion sheath, electron sheath and positive ion sheath. Numerical results also indicate that with the increase of σ, the joining point between positive ion sheath and electron sheath moves away from wall, and the thickness of electron sheath increases obviously.
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Keywords:
- Hall thruster /
- double sheath /
- secondary electron emission
[1] Kim V 1998 J. Propul Power. 14 736
[2] Zhurin V V, Kaufman H R, Robinson R S 1999 Plasma Sources Sci. Technol. 8 R1
[3] Raitses Y, Ashkenazy J, Appelbaum G 1997 25th International Electric Propulsion conference (Electric Rocket Propulsion Society, Cleveland, OH), Paper No. IEPC 97 056
[4] Ahedo E, Gallardo J M, Martinez-Sanchez M 2003 Phys. Plasmas 10 3397
[5] Yu D R, Zhang F K, Li H, Liu H 2009 Acta Phys. Sin. 58 3 (in Chinese) [于达仁, 张凤奎, 李鸿, 刘辉 2009 58 3]
[6] Hobbs G D, Wesson J A 1967Plasma Phys. 9 85
[7] Schwager L A 1993 Phys. Fluids B 5 631
[8] Taccogna F, Longo S, Capitelli M 2005 Phys. Plasmas 12 093506
[9] Ahedo E 2002 Phys. Plasmas 9 4340
[10] Ahedo E, Parra F I 2005 Phys. Plasmas 12 073503
[11] Ahedo E, DePablo V 2007 Phys. Plasmas 14 083501
[12] Yu D R, Qing S W, Wang X G, Ding Y J, Duan P 2011 Acta Phys. Sin. 60 025204 (in Chinese) [于达仁, 卿绍伟, 王晓钢, 丁永杰, 段萍 2011 60 025204]
[13] Duan P, Li X, E Peng, Qing S W 2011 Acta Phys. Sin. 60 125203 (in Chinese) [段萍, 李肸, 鄂鹏, 卿绍伟 2011 60 125203]
[14] Xue Z H, Zhao X Y, Wang F, Liu J Y, Liu Y, Gong Y 2009 Plasma Sci. and Technol. 11 57
[15] Sydorenko D, Smolyakov A, Kaganovich I, Raitses Y 2006 Phys. Plasmas 13 014501
[16] Sydorenko D, Smolyakov A, Kaganovich I, Raitses Y 2006 IEEE Trans. Plasma Sci. 34 815
[17] Wang D Y, Ma J X, Li Y R, Zhang W G 2009 Acta Phys. Sin. 58 8432 (in Chinese) [王道泳, 马锦秀, 李毅人, 张文贵 2009 58 8432]
[18] Morozov A I, Savelyev V V 2001 Reviews of Plasma Physics (Volume 21) (New York Consultants Bureau, New York) p241
[19] Taccogna F, Longo S, Capitelli M 2004 Vacuum 73 89
[20] Ahedo E, De Pablo V 2007 Phys. Plasmas 14 083501
[21] Barral S, Makowski K, Peradzynski Z, Gascon N, Dudeck M 2003 Phys. Plasmas 10 4137
[22] Morozov A I, Savelyev V V 2004 Plasma Phys. Rep. 30 299
-
[1] Kim V 1998 J. Propul Power. 14 736
[2] Zhurin V V, Kaufman H R, Robinson R S 1999 Plasma Sources Sci. Technol. 8 R1
[3] Raitses Y, Ashkenazy J, Appelbaum G 1997 25th International Electric Propulsion conference (Electric Rocket Propulsion Society, Cleveland, OH), Paper No. IEPC 97 056
[4] Ahedo E, Gallardo J M, Martinez-Sanchez M 2003 Phys. Plasmas 10 3397
[5] Yu D R, Zhang F K, Li H, Liu H 2009 Acta Phys. Sin. 58 3 (in Chinese) [于达仁, 张凤奎, 李鸿, 刘辉 2009 58 3]
[6] Hobbs G D, Wesson J A 1967Plasma Phys. 9 85
[7] Schwager L A 1993 Phys. Fluids B 5 631
[8] Taccogna F, Longo S, Capitelli M 2005 Phys. Plasmas 12 093506
[9] Ahedo E 2002 Phys. Plasmas 9 4340
[10] Ahedo E, Parra F I 2005 Phys. Plasmas 12 073503
[11] Ahedo E, DePablo V 2007 Phys. Plasmas 14 083501
[12] Yu D R, Qing S W, Wang X G, Ding Y J, Duan P 2011 Acta Phys. Sin. 60 025204 (in Chinese) [于达仁, 卿绍伟, 王晓钢, 丁永杰, 段萍 2011 60 025204]
[13] Duan P, Li X, E Peng, Qing S W 2011 Acta Phys. Sin. 60 125203 (in Chinese) [段萍, 李肸, 鄂鹏, 卿绍伟 2011 60 125203]
[14] Xue Z H, Zhao X Y, Wang F, Liu J Y, Liu Y, Gong Y 2009 Plasma Sci. and Technol. 11 57
[15] Sydorenko D, Smolyakov A, Kaganovich I, Raitses Y 2006 Phys. Plasmas 13 014501
[16] Sydorenko D, Smolyakov A, Kaganovich I, Raitses Y 2006 IEEE Trans. Plasma Sci. 34 815
[17] Wang D Y, Ma J X, Li Y R, Zhang W G 2009 Acta Phys. Sin. 58 8432 (in Chinese) [王道泳, 马锦秀, 李毅人, 张文贵 2009 58 8432]
[18] Morozov A I, Savelyev V V 2001 Reviews of Plasma Physics (Volume 21) (New York Consultants Bureau, New York) p241
[19] Taccogna F, Longo S, Capitelli M 2004 Vacuum 73 89
[20] Ahedo E, De Pablo V 2007 Phys. Plasmas 14 083501
[21] Barral S, Makowski K, Peradzynski Z, Gascon N, Dudeck M 2003 Phys. Plasmas 10 4137
[22] Morozov A I, Savelyev V V 2004 Plasma Phys. Rep. 30 299
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