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空心阳极等离子体阴极提取电子束的实验分析

DOI: 10.13336/j.1003-6520.hve.2015.02.031, PP. 560-564

Keywords: 电子束,真空电弧,空心阳极,等离子体阴极,阴极电位下垂,半波现象

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Abstract:

低气压下真空电弧放电产生高电子密度的等离子体,从等离子体中能提取电子束。为了研究一种新型空心阳极-等离子体阴极结构的放电机理,在相同电压和阴阳极间隙下,对新型结构与两平板电极结构进行电弧放电实验,通过测量阴极电压、放电回路电流以及收集极电流来比较两者的特点。结果表明前者的阴极电位波形在放电开始之后明显低于两平板电极的阴极电位波形,存在明显的电位下垂现象;同时收集极电流在放电回路电流不大时呈现出只有负半波情况。从真空电弧放电机理具体分析解释了收集极电流呈半波的原因,同时采用等效电路模型和等效电位函数对阴极电位下垂做了详细的分析,认为是阳极附近聚集大量电子,因此有未被补偿的负空间电荷,形成电位梯度较大的阻极电位降,电弧等离子体近似为电中性,导致阴极电位下降。

References

[1]  Oks E M, Brown I G. Electron beam extraction from a broad-beam vacuum-arc metal plasma source[J]. IEEE Transactions on Plasma Science, 1998, 26(5): 1562-1565.
[2]  Oks E M. Generation of electron beams from vacuum arc plasmas[C]∥ISDEIV. XIXth International Symposium on Discharge and Electrical Insulation in Vacuun. Xi’an, China: [s.n.], 2000: 605-608.
[3]  Koval N N, Oks E M, Schanin P M, et al . Broad beam electron sources with plasma cathode, nuclear instruments methods[J]. Physics Research Section A, 1992, 321(3): 417-428.
[4]  Koval N N, Grigoryev S V, Devyatkov V N, et al . Effect of intensified emission during the generation of a submillisecond low-energy electron beam in a plasma-cathode diode[J]. IEEE Transactions on Plasma Science, 2009, 37(10): 1890-1896.
[5]  Bugaev A S, Gushenets, Khuzeev Y A, et al . High-density plasma low energy electron gun based on vacuum arc in a strong magnetic field[C]∥ISDEIV. XIXth International Symposium on Discharge and Electrical Insulation in Vacuun. Xi’an, China: [s.n.], 2000: 629-632.
[6]  Gushenets V I, Goncharov A A, Dobrovolskiy A M, et al . Electrostatic plasma lens focusing of an intense electron beam in an electron source with a vacuum arc plasma cathode[J]. IEEE Transactions on Plasma Science, 2013, 41(8): 2171-2176.
[7]  Goncharov A A, Dobrovolskiy A M, Dunets S P, et al . Electrostatic plasma lens for focusing negatively charged particle beams[J]. Review Scientific Instruments, 2012, 83(2): 2B723.
[8]  胡 明,万树德,夏洋洋,等. 外部磁场对直流电弧等离子体放电特性的影响及其机理[J]. 高电压技术,2013,39(7):1655-1660. HU Ming, WAN Shude, XIA Yangyang, et al . Influence and its mechanism of external magnetic field on DC arc plasma jet[J]. High Voltage Engineering, 2013, 39(7): 1655-1660.
[9]  Jiang H Y, Gai F, Chen S X, et al . Experimental study of electron gun with hollow-anode vacuum-arc-plasma cathode[J]. IEEE Transactions on Electron Devices, 2014, 61(6): 1895-1899.
[10]  过增元,赵文华. 电弧和热等离子体[M]. 北京:科学出版社,1986:77-93. GUO Zengyuan, ZHAO Wenhua. Arc and thermal plasma[M]. Beijing, China: Science Press, 1986: 77-93.
[11]  Ammerman R F, Gammon T, Sen P K, et al . DC-arc model and incident-energy calculation[J]. IEEE Transactions on Industry Applications, 2010, 46(5): 1810-1819.
[12]  潘建昌. 开关火花电阻对脉冲前沿的影响[J]. 强激光与粒子束,2011,23(11):2881-2884. PAN Jianchang. Influence of spark resistance on output pulse front edge of gas switch[J]. High Power Laser and Particle Beams, 2011, 23(11): 2881-2884.
[13]  Nan S H, Rahaman H, Heo H, et al . Empirical analysis of high pressure SF 6 gas breakdown strength in spark gap switch[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2009, 16(4): 1106-1110.
[14]  Nikandrov D S, Tsendin L D, Kolobov V I, et al . Theory of pulsed breakdown of dense gases and optimization of the voltage waveform[J]. IEEE Transactions on Plasma Science, 2008, 36(1): 131-139.
[15]  Montano R, Becerra M, Cooray V, et al . Resistance of spark channels[J]. IEEE Transactions on Plasma Science, 2006, 34(5): 1610-1619.
[16]  Greason W D. Methodology to study the resistance of the park discharges[J]. IEEE Transactions on Industry Application, 1999, 35(2): 359-365.
[17]  Engel T G, Donaldson A L, Kristiansen M. The pulsed discharge arc resistance and its functional behavior[J]. IEEE Transactions on Plasma Science, 1989, 17(2): 323-329.
[18]  Akiyama H, Kristiansen M, Krompholz H, et al . Current-voltage characteristics of a high-current pulsed discharge in air[J]. IEEE Transactions on Plasma Science, 1998, 16(2): 312-316.
[19]  赵凯华,陈熙谋. 电磁学[M]. 北京:高等教育出版社,2003:75-142. ZHAO Kaihua, CHEN Ximou. Electromagnetic[M]. Beijing, China: Higher Education Press, 2003: 75-142.

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