Two-dimensional relativistic space charge limited current flow in the drift space

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题名:	Two-dimensional relativistic space charge limited current flow in the drift space
作者:	劉耀澧;Liu, Y. L.;Chen, S. H.;Koh, W. S.;Ang, L. K.
贡献者:	理學院物理學系
关键词:	70 PLASMA PHYSICS AND FUSION TECHNOLOGY;CHARGE DENSITY;Child-Langmuir law;Computer simulation;CURRENT DENSITY;CURRENTS;Drift;Formulations;Particle in cell technique;Plasma physics;Relativism;Relativistic effects;RELATIVISTIC RANGE;SIMULATION;SPACE CHARGE;Static models;STEADY-STATE CONDITIONS;Two dimensional analysis;Two dimensional models;TWO-DIMENSIONAL CALCULATIONS
日期:	2014-01-01
上传时间:	2026-04-23 14:46:16 (UTC+8)
出版者:	Melville: American Institute of Physics
摘要:	摘要： Relativistic two-dimensional (2D) electrostatic (ES) formulations have been derived for studying the steady-state space charge limited (SCL) current flow of a finite width W in a drift space with a gap distance D. The theoretical analyses show that the 2D SCL current density in terms of the 1D SCL current density monotonically increases with D/W, and the theory recovers the 1D classical Child-Langmuir law in the drift space under the approximation of uniform charge density in the transverse direction. A 2D static model has also been constructed to study the dynamical behaviors of the current flow with current density exceeding the SCL current density, and the static theory for evaluating the transmitted current fraction and minimum potential position have been verified by using 2D ES particle-in-cell simulation. The results show the 2D SCL current density is mainly determined by the geometrical effects, but the dynamical behaviors of the current flow are mainly determined by the relativistic effect at the current density exceeding the SCL current density. 出版者： Melville: American Institute of Physics 出版日期： 2014-04-01 出處： Physics of plasmas, 2014-04, Vol.21 (4) 資源來源： AIP Journals (American Institute of Physics) 版權： AIP Publishing LLC 版權： 2014 AIP Publishing LLC. 識別號： ISSN: 1070-664X 識別號： EISSN: 1089-7674 識別號： DOI: 10.1063/1.4869732 識別號： CODEN: PHPAEN
显示于类别:	[物理學系] 期刊論文

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