Two-dimensional space-charge-limited flows in a crossed-field gap

Journal Article · Mon Apr 02 00:00:00 EDT 2007 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2720710· OSTI ID:20960192

Koh, W S; Ang, L K ^[1]

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1. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore and Institute of High Performance Computing, Singapore 117528 (Singapore)

This letter presents a two-dimensional (2D) model of space-charge-limited current in a planar crossed-field gap with a magnetic strength of B/B{sub H}=0-3, where B{sub H} is the Hull cutoff magnetic field. The electrons are emitted from an infinite length strip of finite width W comparable to the gap spacing D. It is found that the 2D enhancement of the crossed-field limiting current is 1+Fx4D/({pi}W), where F (=0.05-0.5) is a normalized mean-position factor, and it is a function of B/B{sub H}. Good agreement has been obtained in comparisons with particle-in-cell simulation.

• OSTI ID: 20960192
• Journal Information: Applied Physics Letters, Vol. 90, Issue 14; Other Information: DOI: 10.1063/1.2720710; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMPARATIVE EVALUATIONS
CROSSED FIELDS
ELECTRON EMISSION
ELECTRONS
MAGNETIC FIELDS
MAGNETOHYDRODYNAMICS
PLASMA
PLASMA SIMULATION
SPACE CHARGE
TWO-DIMENSIONAL CALCULATIONS