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

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/52991

Title:	Two-dimensional electromagnetic Child-Langmuir law of a short-pulse electron flow
Authors:	Chen,SH;Tai,LC;Liu,YL;Ang,LK;Koh,WS
Contributors:	物理學系
Keywords:	CHARGE-LIMITED FLOW;SPACE-CHARGE;RF GUN;BEAM;EMISSION;OPERATION
Date:	2011
Issue Date:	2012-06-11 10:53:13 (UTC+8)
Publisher:	國立中央大學
Abstract:	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]
Relation:	PHYSICS OF PLASMAS
Appears in Collections:	[Department of Physics] journal & Dissertation

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