Two-dimensional electromagnetic Child-Langmuir law of a short-pulse electron flow

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题名:	Two-dimensional electromagnetic Child-Langmuir law of a short-pulse electron flow
作者:	Chen,SH;Tai,LC;Liu,YL;Ang,LK;Koh,WS
贡献者:	物理學系
关键词:	CHARGE-LIMITED FLOW;SPACE-CHARGE;RF GUN;BEAM;EMISSION;OPERATION
日期:	2011
上传时间:	2012-06-11 10:53:13 (UTC+8)
出版者:	國立中央大學
摘要:	Two-dimensional electromagnetic particle-in-cell simulations were performed to study the effect of the displacement current and the self-magnetic field on the space charge limited current density or the Child-Langmuir law of a short-pulse electron flow with a propagation distance of zeta and an emitting width of W from the classical regime to the relativistic regime. Numerical scaling of the two-dimensional electromagnetic Child-Langmuir law was constructed and it scales with (zeta/W) and (zeta/W)(2) at the classical and relativistic regimes, respectively. Our findings reveal that the displacement current can considerably enhance the space charge limited current density as compared to the well-known two-dimensional electrostatic Child-Langmuir law even at the classical regime. (C) 2011 American Institute of Physics. [doi:10.1063/1.3553451]
關聯:	PHYSICS OF PLASMAS
显示于类别:	[物理學系] 期刊論文

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