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霍尔推进器放电通道等离子体与壁面相互作用形成鞘层，不同壁面材料的二次电子发射对推进器鞘层特性具有重要影响. 本文针对推进器壁面鞘层区域建立二维物理模型，研究了氮化硼（BN）、碳化硅（SiC）和三氧化二铝（Al2O3）三种不同壁面材料的二次电子发射特性，在改进SiC材料二次电子发射模型的基础上，采用粒子模拟方法，讨论了壁面二次电子发射系数与电子温度和磁场强度的关系，研究了三种材料（BN，SiC和Al2O3）的鞘层特性. 结果表明：修正的二次电子发射模型拟合曲线与实验曲线几乎一致；在相同电子温度下，三种材料（BN，SiC和Al2O3）的二次电子发射系数和壁面电子数密度依次增大，而鞘层电场和鞘层电势降依次减小. BN材料具有合适的二次电子发生射系数，使得霍尔推进器能在低电流下稳态工作.Hall thruster plasma discharge channels interact with wall forming sheath, and different secondary electron emission coefficients of wall material can considerably affect sheath characteristics. In this paper, we establish a two-dimensional physical model in wall sheath area to study the secondary electron emission characteristics of three different wall materials which are boron nitride (BN), silicon carbide (SiC) and aluminium oxide (Al2O3), and SiC material secondary electron emission model is improved. On the basis of improved secondary electron emission model, the relationship between the wall secondary electron emission coefficient and both electron temperature and magnetic field intensity is discussed by the particle in cell simulation method, and the different sheath properties of three materials (BN, SiC and Al2O3), are also investigated. The results show that fitting curve is consistent with the experimental results; at the same electron temperature, the values of secondary electron emission coefficient and electron density of three materials (BN, SiC and Al2O3) increase but the values of sheath electric field and sheath potential drop decrease in their sequence. The BN material has the appropriate secondary electron radiation coefficient, which makes the thruster work steadily under low current condition.
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Keywords:
- Hall thruster /
- wall material /
- sheath secondary emission
[1] Jankovsky R S, Jacobson D T, Sarmiento C J, Pinero L R, Sarmiento C J 2002 38th Joint Propulsion Conference and Exhibit Indianapolis Indiana, July 7-10, 2002 AIAA-2002-3675
[2] Steven R O, John M S 2000 3rd International Spacecraft Propulsion Conference Cannes, France, October 10-13, 2000 NASA/TM-2001-210676
[3] Mao G W, Fu X P, Chen M L 2008 Mech. Sci. Technol. Aerosp. Engineer. 27 853 (in Chinese) [毛根旺, 付西鹏 2008 机械科学与技术 27 853]
[4] Brandhorst H W, O’Neill M J, Alan Jones P, Joseph Cassady R 2002 Acta Astronaut. 51 57
[5] Kang X L, Yu S L, Qiao C X, Zhao Z, Hang G R, Qiu G, Chen H H, Zhang Y 2012 Proceeding of the 8th Chinese Electric Propulsion Conference Beijing China Novemberm 16-18, 2012 180 (in Chinese) [康小录, 余水淋, 乔彩霞, 赵震, 杭观荣, 邱刚, 陈海辉, 张岩 2012 第八届中国电推进技术学术研讨会北京, 中国, 11月16–18, 2012 p180]
[6] Sydorenko D, Smolyakov A 2006 IEEE Trans. Plasma Sci. 34 815824
[7] Sydorenko D, Smolyakov A, Kaganovich I 2008 Phys. Plasmas 15 053506
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[9] Gascona N, Dudeck M 2003 Phys. Plasmas 16 053906
[10] Sydorenko D 2006 Ph. D. Dissertation (Saskatoon: Saskatchewan University of Saskatchewan) pp16-17
[11] Morozov A I, Savelyev V V 2001 Proceedings of the 27th International Electric Propulsion Conference Pasadena, USA, October 14-19, 2001 p95
[12] Morozov A I, Savelyev V V 2004 Phys. Plasmas 30 330
[13] Taccognaa F 2012 AIP Conf. Proc. 15 011390
[14] Qing S W, E P, Duan P 2012 Acta Phys. Sin. 61 205202 (in Chinese) [卿绍伟, 鄂鹏, 段萍 2012 61 205202]
[15] Shao F Q 2002 Plasma Particle Simulation (Beijing: Science Press) p12 (in Chinese) [邵福球 2002 等离子体粒子模拟 (北京: 科学出版社) 第12页]
[16] Zhao X Y, Liu J Y, Duan P, Li S G 2012 Chin. J. Va-cuum Sci. Technol. 32 279 (in Chinese) [赵晓云, 刘金远, 段萍, 李世刚 2012 真空科学与技术学报 32 279]
[17] Barral S, Makowski K, Peradzyński Z, Gascon N, Dudeck M 2003 Phys. Plasmas 10 4137
[18] Dunaevsky A, Raitses Y, Fisch N J2003 Phys. Plasmas 10 2574
[19] Zhang F K, Ding Y J, Qing S W Wu X D 2011 Chin. Phys. B 20 125201
[20] Shu S 2006 M. S. Dissertation (Harbin: Harbin Institute of Technology of China) (in Chinese) [疏舒 2006 硕士论文 (哈尔滨: 哈尔滨工业大学)]
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[1] Jankovsky R S, Jacobson D T, Sarmiento C J, Pinero L R, Sarmiento C J 2002 38th Joint Propulsion Conference and Exhibit Indianapolis Indiana, July 7-10, 2002 AIAA-2002-3675
[2] Steven R O, John M S 2000 3rd International Spacecraft Propulsion Conference Cannes, France, October 10-13, 2000 NASA/TM-2001-210676
[3] Mao G W, Fu X P, Chen M L 2008 Mech. Sci. Technol. Aerosp. Engineer. 27 853 (in Chinese) [毛根旺, 付西鹏 2008 机械科学与技术 27 853]
[4] Brandhorst H W, O’Neill M J, Alan Jones P, Joseph Cassady R 2002 Acta Astronaut. 51 57
[5] Kang X L, Yu S L, Qiao C X, Zhao Z, Hang G R, Qiu G, Chen H H, Zhang Y 2012 Proceeding of the 8th Chinese Electric Propulsion Conference Beijing China Novemberm 16-18, 2012 180 (in Chinese) [康小录, 余水淋, 乔彩霞, 赵震, 杭观荣, 邱刚, 陈海辉, 张岩 2012 第八届中国电推进技术学术研讨会北京, 中国, 11月16–18, 2012 p180]
[6] Sydorenko D, Smolyakov A 2006 IEEE Trans. Plasma Sci. 34 815824
[7] Sydorenko D, Smolyakov A, Kaganovich I 2008 Phys. Plasmas 15 053506
[8] Yu D R, Zhang F K, Li H, Liu H 2009 Acta Phys. Sin. 58 1844 (in Chinese) [于达仁, 张凤奎, 李鸿, 刘辉 2009 58 1844]
[9] Gascona N, Dudeck M 2003 Phys. Plasmas 16 053906
[10] Sydorenko D 2006 Ph. D. Dissertation (Saskatoon: Saskatchewan University of Saskatchewan) pp16-17
[11] Morozov A I, Savelyev V V 2001 Proceedings of the 27th International Electric Propulsion Conference Pasadena, USA, October 14-19, 2001 p95
[12] Morozov A I, Savelyev V V 2004 Phys. Plasmas 30 330
[13] Taccognaa F 2012 AIP Conf. Proc. 15 011390
[14] Qing S W, E P, Duan P 2012 Acta Phys. Sin. 61 205202 (in Chinese) [卿绍伟, 鄂鹏, 段萍 2012 61 205202]
[15] Shao F Q 2002 Plasma Particle Simulation (Beijing: Science Press) p12 (in Chinese) [邵福球 2002 等离子体粒子模拟 (北京: 科学出版社) 第12页]
[16] Zhao X Y, Liu J Y, Duan P, Li S G 2012 Chin. J. Va-cuum Sci. Technol. 32 279 (in Chinese) [赵晓云, 刘金远, 段萍, 李世刚 2012 真空科学与技术学报 32 279]
[17] Barral S, Makowski K, Peradzyński Z, Gascon N, Dudeck M 2003 Phys. Plasmas 10 4137
[18] Dunaevsky A, Raitses Y, Fisch N J2003 Phys. Plasmas 10 2574
[19] Zhang F K, Ding Y J, Qing S W Wu X D 2011 Chin. Phys. B 20 125201
[20] Shu S 2006 M. S. Dissertation (Harbin: Harbin Institute of Technology of China) (in Chinese) [疏舒 2006 硕士论文 (哈尔滨: 哈尔滨工业大学)]
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