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Field enhancement factor for a tall closely-spaced array of identical conducting posts, and implications for fowler-nordheim theory

Forbes, RG (2012) Field enhancement factor for a tall closely-spaced array of identical conducting posts, and implications for fowler-nordheim theory

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Abstract

This paper derives an approximate formula for the field enhancement factor for a tall closely-packed array of identical conducting posts. It confirms a formula derived from the work of Zhbanov et al. [J. Appl. Phys. 110, 114311 (2011)], but displays the principles underlying collective screening more clearly. A formula for the area efficiency of emission (α ) for this array is also derived. Since α ≪1, it follows that a macroscopic pre-exponential correction factor (λ ) must be included in the formula for the macroscopic ("LAFE-average") emission current density (J ) for a large-area field emitter (LAFE). Omission of λ may cause great theoretical over-prediction of the value of J . © 2012 IEEE.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Authors :
NameEmailORCID
Forbes, RGr.forbes@surrey.ac.ukUNSPECIFIED
Date : 2012
Identification Number : https://doi.org/10.1109/IVNC.2012.6316935
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:38
Last Modified : 17 May 2017 15:05
URI: http://epubs.surrey.ac.uk/id/eprint/836115

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