[1] Farnsworth P 1934 J. Franklin Inst. 218 411
[2] Vaughan J 1988 IEEE Trans. Electron Dev. 35 1172
[3] Zhang N, Cui W Z, Hu T C, Wang X B 2011 Space Electron. Technol. 1 38 (in Chinese) [张娜, 崔万照, 胡天存, 王新波 2011 空间电子技术 1 38]
[4] Vdovicheva N K, Sazontov A G, Semenov V E 2004 Radiophys. Quantum Electron. 47 580
[5] Anza S, Vicente C, Gil J, Boria V E, Gimeno B, Raboso D 2010 Phys. Plasmas 17 062110
[6] Sazontov A G, Sazontov V A, Vdovicheva N K 2008 Contrib. Plasma Phys. 48 331
[7] Udiljak R, Anderson D, Lisak M, Semenov V E, Puech J 2007 Phys. Plasmas 14 033508
[8] Burt G, Carter R G, Dexter A C, Hall B, Smith J D A 2009 Proc. SRF 09 321
[9] Nieter C, Stoltz P H, Roark C, Mahalingam S 2010 AIP Conf. Proc. 1299 399
[10] Kishek R A, Lau Y Y 1998 Phys. Rev. Lett. 80 193
[11] Lau Y Y, Kishek R A, Gilgenbach R M 1998 IEEE Trans. Plasma Sci. 26 290
[12] Li Y D, Yan Y J, Lin S, Wang H G, Liu C L 2014 Acta Phys. Sin. 63 047902 (in Chinese) [李永东, 闫杨娇, 林舒, 王洪广, 刘纯亮 2014 物理学报 63 047902]
[13] Li Y D, Yang W J, Zhang N, Cui W Z, Liu C L 2013 Acta Phys. Sin. 62 077901 (in Chinese) [李永东, 杨文晋, 张娜, 崔万照, 刘纯亮 2013 物理学报 62 077901]
[14] Xie A G, Zhang J, Wang T B 2011 Chin. Phys. Lett. 28 097901
[15] Zhu F, Zhang Z C, Dai S, Luo J R 2011 Acta Phys. Sin. 60 084103 (in Chinese) [朱方, 张兆传, 戴舜, 罗积润 2011 物理学报 60 084103]
[16] Li X Y, Chen C M 2008 Math. Appl. 28 62 (in Chinese) [李夏云, 陈传淼 2008 数学理论与应用 28 62]