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强流电子束源阴极等离子体的粒子模拟 被引量:4

Particle-in-cell simulation on plasma near the cathode of high current electron beam source
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摘要 模拟了强流电子束源阴极表面附近区域数密度约1014 cm-3的等离子体的膨胀过程,观察到等离子体膨胀速度约为1cm/μs。通过观察不同时刻阴极附近电子和离子的相空间分布、数密度分布和轴向电场分布,分析了等离子体膨胀过程。结果表明:等离子体的产生使得阴极表面电场增强,进而增大阴极的电流发射密度,电流密度增加使得空间电荷效应增强,并使等离子体前沿处的电场减小,当等离子体前沿处的电场减小到零时等离子体向阳极膨胀。讨论了等离子体温度、离子质量、束流密度和离子产生率对等离子体膨胀速度的影响。结果表明:等离子体的膨胀速度随着等离子体温度升高而增大,随离子质量增大而减小,但膨胀速度不等于离子声速;等离子体产生率越小,等离子体膨胀速度越小。 This paper presented the particle-in-cell simulations on the expansion process of the plasma with a density about 1014 cm-3 near the cathode surface.The plasma expanding with velocity about 1 cm/μs was observed.The expansion process was analyzed based on the observations of the particle distributions,the particle velocity and the axial electric field at different time.The influences of the plasma temperature and plasma formation rate on the plasma expansion process were discussed.It is shown that the appearance of ions strengthens the electric field on the cathode surface,leading to the increase of electron beam density.The electron field at the plasma front decreases with the increase of beam density,thus the movement of ions towards anode can be realized.The plasma expansion velocity increases while the plasma temperature grows up.However,the relationship of thermal velocity can not apply.Smaller plasma formation rate leads to lower plasma expansion.
作者 徐启福 刘列
出处 《强激光与粒子束》 EI CAS CSCD 北大核心 2011年第11期2974-2978,共5页 High Power Laser and Particle Beams
基金 国家自然科学基金项目(10975186)
关键词 强流电子束二极管 爆炸电子发射 阴极等离子体 等离子体膨胀速度 粒子模拟 electron beam diode explosion electron emission cathode plasma plasma expansion velocity particle-in-cell simulation
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参考文献13

  • 1宋法伦,张永辉,向飞,赵殿林,刘忠,甘延青,鞠炳全.平面二极管爆炸发射阴极特性实验研究[J].强激光与粒子束,2008,20(9):1511-1515. 被引量:8
  • 2宫玉彬,张章,魏彦玉,孟凡宝,范植开,王文祥.高功率微波器件中脉冲缩短现象的粒子模拟[J].物理学报,2004,53(11):3990-3995. 被引量:17
  • 3夏连胜,王勐,黄子平,张开志,石金水,章林文,邓建军.强流电子二极管中阴极等离子体的膨胀[J].物理学报,2004,53(10):3435-3439. 被引量:26
  • 4Liao Qingliang,Zhang Yue,Qi Junjie,et al.Plasma-induced field emission and plasma expansion of carbon nanotube cathodes. Journalof Physics D:Applied Physics . 2007
  • 5Mesyats G A.Cathode phenomena in a vacuum discharge:the breakdown,the spark and the arc. . 2000
  • 6Krasik Ya,Gleizer J,Yarmolich D,et al.Characterization of the plasma on dielectric fiber"velvet"cathodes. Journal of Applied Phy-sics . 2005
  • 7Roy A,Menon R,Mitra S,et al.Plasma expansion and fast gap closure in a high power electron beam diode. Physics of Plasmas . 2009
  • 8Litvinov E,Nemirovskii A Z.Model of the explosive-emission center ignition on a cathode surface. 20th International Symposium onDischarges and Electrical Insulation in Vacuum . 2002
  • 9Wang Lijun,Jia Shenli,Liu Ke,et al.Numerical simulation of high-current vacuum arc characteristics under combined action of axial mag-netic field and external magnetic field from bus bar. Physics of Plasmas . 2009
  • 10Welch D,Rose D,N Bruner,et al.Hybrid simulation of electrode plasmas in high-power diodes. Physics of Plasmas . 2009

二级参考文献15

共引文献45

同被引文献45

  • 1夏连胜,王勐,黄子平,张开志,石金水,章林文,邓建军.强流电子二极管中阴极等离子体的膨胀[J].物理学报,2004,53(10):3435-3439. 被引量:26
  • 2刘国治,孙钧,邵浩,杨占峰.场致爆炸发射阴极有效发射面积研究[J].强激光与粒子束,2005,17(2):249-252. 被引量:10
  • 3王建国,牛胜利,等.高空核爆炸效应参数手册[M].北京:原子能出版社,2010.
  • 4KushnirD,WaxmanE.HardX-rayemissionfromaccretionshocksaroundgalaxyclusters[J].JournalofCosmologyandAstroparticlePhysics,2010,25(2):1-14.
  • 5SchmidtGR,ManzellaDH,KamhawiH,etal.Radioisotopeelectricpropulsion(REP):Anear-termapproachtonuclearpropulsion[J].ActaAstronautica,2010,66(7):501-507.
  • 6AndreasBecker,BerndSchurr,KalinowskiMB,etal.Introductiontothetopicalvolume:recentadvancesinnuclearexplosionmonitoring[J].PureApplGeophys,2010,167(7):373-379.
  • 7JaneL,FoxMarinaI,GalandRobertE,etal.Energydepositioninplanetaryatmospheresbychargedparticlesandsolarphotons[J].SpaceSciRev,2008,19(39):213-220.
  • 8RabasovicM D,MarkushevDD.Laserbeamspatialprofiledeterminationbypulsedphotoacoustics:exactsolution[J].MeasSciTechnol,2010,21:065603.
  • 9Esam M A,HusseinPE.MonteCarloparticletransportwiththeMCNPcode[D].NewBrunswick:DepartmentofMechanicalEngineeringUniversityofNewBrunswick,2011:1-57.
  • 10张学粮,张化-.电子束能量在线测量方法的MCNP模拟和实验研究[C]//第十四届全国核电子学与核探测技术学术年会论文集.2008.

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