低气压条件下的铁电体离子发射特性研究
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摘要
以低气压条件下的铁电体离子发射特性为研究对象,通过结合高速相机、光谱的光学诊断和二维网格质点法耦合蒙特卡洛碰撞模型(PIC-MCC)的仿真模拟获得了锆钛酸铅(PZT)铁电体离子发射的主要成分、表面放电的发光及等离子体演化过程、离子的产生及离子电流形成机制,为进一步研究铁电体离子源奠定了基础。
Characteristics of ion emission from the ferroelectric media was investigated under low pressure condition. By utilizing high-speed camera photography, spectral analysis, and particle-in-cell simulation coupling with Monte Carlo collision, the optical emission composition and images from ferroelectric surface, plasma evolution of ferroelectric surface discharge, the mechanism of ion generation and the forming of ion current are discussed. These results are useful for further understanding to ferroelectric ion sources.
Characteristics of ion emission from the ferroelectric media was investigated under low pressure condition. By utilizing high-speed camera photography, spectral analysis, and particle-in-cell simulation coupling with Monte Carlo collision, the optical emission composition and images from ferroelectric surface, plasma evolution of ferroelectric surface discharge, the mechanism of ion generation and the forming of ion current are discussed. These results are useful for further understanding to ferroelectric ion sources.
引文
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[14]Chung M S,Mayer A,Miskovsky N M,et al.Dielectric effect on electric fields in the vicinity of the metal-vacuum-dielectric junction[J].Ultramicroscopy,2013,132:41-47.
[2]Stepanov A D,Gilson E P,Grisham L R,et al.Dynamics of ion beam charge neutralization by ferroelectric plasma sources[J].Phys.Plasmas,2016,23(4):043113.
[3]黄旭东,刘洪,冯玉军,等.铁电阴极前电极表面等离子体横向扩散速度估算[J].强激光与离子束,2014,26(1):014008.
[4]Hutsel B T,Kovaleski S D,Kwon J W.Optimization of piezoelectric resonance effect in a piezoelectric trans former plasma source[J].IEEE Tran.on Plasma Science,2013,41(2):305-311.
[5]Gilson E P,Davidson R C,Efthimion P C,et al.Ferroelectric plasma sources for NDCX-II and heavy ion drivers[J].Nuclear Instruments and Methods in Physics Research A,2014,733:75-79.
[6]Kemp M A,Kovaleski S D.Thrust measurements of the ferroelectric plasma thruster[J].IEEE Tran.on Plasma Science,2008,36(2):356-362.
[7]Sroubek Z.Mechanism of negative ion emission from surfaces of ferroelectrics[J].Surface Science,2012,606:1327-1330.
[8]Gurovich V T,Krasik Y E,Raichlin V,et al.Addressing the plasma formation on the surface of a ferroelectric sample[J].J.Appl.Phys.,2009,105(5):053301.
[9]Yukikazu I.Cross sectrions for electron collisions with nitrogen molecules[J].J.Phys.Chem.Ref.Data,2006,35(1):31-53.
[10]Straub H C,Renault P,Lindsay B G,et al.Absolute partial cross sections for electron-impact ionization of H2,N2,and O2 from threshold to 1000eV[J].Phys.Rev.A,1996,54(3):2146-2153.
[11]Walker C G H,El-Gomati M M,Assa’d A M D,et al.The secondary electron emission yield for 24 solid elements excited by primary electrons in the range250~5000e V:a theory/experiment comparison[J].Scanning,2008,30(5):365-380.
[12]Dixit A V,Rajopadhye N R,Bhoraskar S V.Secondary electron emission of doped PZT ceramics[J].J.Mater.Sci.,1986,21:2798-2802.
[13]徐翱,尚绍环,金大志,等.基于二维PIC-DSMC的微间隙气体放电等离子体演化过程研究[J].电子器件,2016,39(5):1025-1030.
[14]Chung M S,Mayer A,Miskovsky N M,et al.Dielectric effect on electric fields in the vicinity of the metal-vacuum-dielectric junction[J].Ultramicroscopy,2013,132:41-47.